Places

This is a list of all the dungeons and cities in the game, what is for sale in the cities and the cost of their inn, and what treasures you can find in the cities and the dungeons.  The difference is that, with only a few exceptions, dungeons have enemies and don't sell things and cities don't have enemies and do sell things.

Truce - City - 1,000 AD - 10G Inn
For Sale: Iron Blade, Lode Sword, Karate Gi, BronzeHelm
Treasures: 200G (from Crono's Mom), Tonic, 100G, 300G (from Mayor)

Porre - City - 1,000 AD - 20G Inn
For Sale: SteelSaber, Iron Bow, Dart Gun, Karate Gi, BronzeMail, BronzeHelm, Tonic, Heal, Revive, Shelter, Jerky
Treasures: Shelter, 10 G (from Mayor)

Guardia Forest - Dungeon - 1,000 AD
Treasures: Power Tab

Truce Canyon - Dungeon - 600 AD
Treasures: Tonic, PowerGlove

Truce - City - 600 AD - 10G Inn
For Sale: Iron Blade, Dart Gun, Karate Gi, BronzeHelm, Tonic, Heal, Revive, Shelter

Guardia Forest - Dungeon - 600 AD
Treasures: Power Tab, Infinite Shelters (Check Bush, leave forest, come back, check bush again, etc.)

Guardia Castle - City - 600 AD - Free Refreshment
Treasures: Ether, 100G, BronzeMail, Tonic, Ether

Cathedral - Dungeon - 600 AD
Treasures: Revive, Tonic, 100 G, Ether, Speed Belt, Defender, MaidenSuit, Tonic, Ether, Naga-ette Bromide, SteelSaber, Power Tab, Heal, Heal, Tonic, Shelter, Iron Sword, Mid Ether, Chancellor

Truce (after you go to 600 AD) - City - 1,000 AD - 10G Inn
For Sale: Iron Blade, Lode Sword, SteelSaber, Iron Bow, BronzeMail, MaidenSuit, BronzeHelm, Tonic, Heal, Revive, Shelter

Guardia Castle Dungeon - Dungeon - 1,000 AD - Free Refreshment
Treasures: Ether (If you were innocent), Ether, Mid Tonic, Mid Tonic, Ether, Mid Tonic (Knock out Guard), Mid Tonic (Knock out Guard), Fritz, Mid Tonic, BronzeMail, Mid Tonic (Knock out Guard), Shelter, Shelter, 1500 G, Lode Sword, Mid Tonic x5, Shelter

Trann Dome - City - 2,300 AD - Free Inn
For Sale: Auto Gun, Iron Suit, Iron Helm, Tonic, Mid Tonic, Heal, Revive, Shelter

Lab 16 - Dungeon - 2,300 AD
Treasures: Berserker, Lode Sword, Lode Bow, Ether

Arris Dome - City - 2,300 AD - Free Inn
For Sale: Auto Gun, Iron Suit, Iron Helm, Tonic, Heal, Revive, Shelter

Arris Dome - Dungeon - 2,300 AD
Treasure: Seed, Mid Ether, Mid Ether, Bike Key

Lab 32 - Dungeon - 2,300 AD
Treasures: Mid Tonic, Race Log, Power Tab (for a score of 1500 on the race with the Race Log)

Factory - Dungeon - 2,300 AD
Treasures: Mid Ether, Robin Bow, Ether, Mid Tonic, Mid Ether, 400 G, Shelter, Ether, Bolt Sword, Shelter, Titan Vest, Hammer Arm, Plasma Gun

End of Time (all treasures you get from fighting Spekkio on different levels)
Levels 1-9: 1 Magic Tab
Levels 10-19: 1 Magic Tab, 5 Ethers
Levels 20-29: 1 Magic Tab, 5 Mid Ethers
Levels 30-39: 1 Magic Tab, 5 Full Ethers
Levels 40-98: 1 Magic Tab, 1 Speed Tab, 1 Power Tab, 10 Elixirs
Level 99: 10 Magic Tabs, 10 Speed Tabs, 10 Power Tabs, 10 MegaElixirs

Medina/Forest Ruins/Melchior's Hut - City - 1,000 AD - 200 Inn
For Sale: Iron Blade, SteelSaber, Demon Edge, Lumin Robe, Flash Mail, Glow Helm, Tonic, Mid Tonic, Full Tonic, Heal, Revive, Shelter, Ether, Red Katana, Robin Bow, Plasma Gun, Hammer Arm, Titan Vest
Treasures: Speed Tab, Magic Tab, Mid Ether

Heckran Cave - Dungeon - 1,000 AD
Treasures: Ether, MagicScarf, Mid Ether, Ether

Lucca's House (after you've come through Heckran Cave) - City - 1,000 AD
Treasures: Taban Vest

Truce (after rescuing Fritz) - City - 1,000 AD - 10G Inn
For Sale: Red Katana, Robin Bow, Plasma Gun, Hammer Arm, Titan Vest, Tonic, Heal, Revive, Shelter

Guardia Castle - City - 600 AD - Free Refreshment
Treasures: Jerky, Power Tab (you get both of these while leaving after talking to the chef)

Zenan Bridge - Dungeon - 600 AD
Treasures: Gold Helm

Dorino - City - 600 AD - 50G Inn
For Sale: Tonic, Mid Tonic, Heal, Revive, Shelter
Treasures: Magic Tab (Give man Naga-ette Bromide)

Fiona's Villa - City - 600 AD
Treasures: Mid Ether, Mid Ether

Porre - City - 600 AD - 20G Inn
For Sale: Gold Suit, Beret, Tonic, Mid Tonic, Heal, Revive, Shelter
Treasures: Power Tab

Cursed Woods - Dungeon - 600 AD
Treasures: Mid Tonic, Shelter, MagicScarf

Denadoro Mts - Dungeon - 600 AD
Treasures: 300 G, MirageHand, Revive, Ether, 500 G, Mid Ether, Revive, Gold Helm, Mid Tonic, Mid Ether, 600 G, 300 G, SilverStud, SilverErng, Mid Tonic, Mid Ether, Magic Tab, Mid Ether, Speed Tab, Gold Suit, Shelter, Bent Sword

Porre (after you get the Bent Sword) - City - 600 AD
Treasures: Hero Medal

Cursed Woods (after you get the Hero Medal) - Dungeon - 600 AD
Treasures: Bent Hilt

Mystic Mountain (after you get the Bent Hilt and talk to Melchoir) - Dungeon - 65,000,000 BC
Treasures: Berserker

Ioka Village (after you get the Bent Hilt and talk to Melchior) - City - 65,000,000 BC - Free refreshment
For Sale: Ruby Gun, Sage Bow, Stone Arm, Flint Edge, Ruby Vest, Rock Helm, Tonic, Mid Tonic, Heal
Treasures: Tonic (after Ayla joins)

Hunting Range - Dungeon - 65,000,000 BC
Treasures: Third Eye (defeat Nu)

Forest Maze - Dungeon - 65,000,000 BC
Treasures: Mid Tonic, Revive, Mid Ether, Mid Tonic, Revive, Shelter, Mid Tonic, Heal, Mid Ether

Reptite Lair - Dungeon - 65,000,000 BC
Treasures: Mid Ether, Ruby Vest, Full Tonic, Mid Ether, Full Tonic, Full Ether, Rock Helm, Full Ether

Melchior's Hut (after you get the Dreamstone) - City - 1,000 AD
Treasures: Masamune

Lucca's House (after you get the Masamune) - City - 1000 AD
Treasures: Taban Helm

Magus's Lair - Dungeon - 600 AD
Mid Ether, Mid Ether, Shelter, Mid Ether, Slasher, Barrier, Magic Tab, Mist Robe, Dark Mail, DoomFinger, Mid Ether, Lapis, Barrier, Shelter, Magic Tab, Speed Belt, Revive, Mist Robe, MagicScarf

Guardia Castle (after you defeat Magus, only if you have Marle in your party) - City - 1000 AD - Free refreshment
Treasures: HyperEther, Elixir, Full Ether, HyperEther, MegaElixir

Ioka Village (after you defeat Magus) - City - 65,000,000 BC - Free refreshment
For Sale: Dream Gun, Dream Bow, Magma Hand, Aeon Blade, Ruby Vest, Rock Helm, Tonic, Mid Tonic, Heal

Dactyl Nest - Dungeon - 65,000,000 BC
Treasures: Mid Ether, , Meso Mail

Tyrano Lair - Dungeon - 65,000,000 BC
Treasures: Mid Ether, Full Tonic, CeraTopper, Tonic, Revive, Meso Mail, Full Ether, CeraTopper, Mid Ether

Enhasa - City - 12,000 BC - Free healing
For Sale: Tonic, Mid Tonic, Full Tonic, Heal, Revive, Shelter, Ether
Treasures: Magic Tab, Speed Tab

Kajar - City - 12,000 BC - Free healing
For Sale: Tonic, Mid Tonic, Full Tonic, Heal, Revive, Shelter, Ether
Treasures: Speed Tab, Black Rock, Magic Tab (you can only get this last treasure after you have scratched the back of the Nu in Zeal Palace)

Zeal Palace - City - 12,000 BC - Free healing

At this point you can get most of the sealed treasure chests (see the sealed treasure chests list to see which ones are where and tips on how to get them).  Before you go to the Keeper's Dome you can get all the Sealed Treasure Chests except the ones in the Castle Ruins and, of course, Keeper's Dome.

Sewer Access - Dungeon - 2,300 AD
Treasures: 600 G, Rage Band, Bolt Sword

Keeper's Dome - Dungeon - 2,300 AD
Treasures: Magic Tab

Lucca's House (after you get the Epoch) - City - 1,000 AD
Treasures: Taban Suit

Algetty (Terra Cave) - City - 12,000 BC - Free Inn
For Sale: Demon Edge, CometArrow, Megablast, MegatonArm, FlashBlade, Lumin Robe, Flash Mail, Glow Helm, Tonic, Mid Tonic, Full Tonic, Heal, Revive, Shelter, Ether

Beasts' Nest - Dungeon - 12,000 BC
Treasures: Power Tab

Mountain of Woe - Dungeon - 12,000 BC
Treasurse: Lode Helm, Lode Vest, Shield, Barrier, Lapis, Barrier, Lapis, Full Ether, Barrier, Shelter, Shield, Time Hat, Full Ether, Magic Tab

Terra Cave (after the Mountain of Woe) - City - 12,000 BC
Treasures: Ruby Knife

Kajar (after the Mountain of Woe) - City - 12,000 BC - Free healing
For Sale: AlloyBlade, Pearl Edge, Big Hand, Lode Vest, Lode Helm, Tonic, Mid Tonic, Full Tonic, Heal, Revive, Shelter, Ether

Ocean Palace - Dungeon - 12,000 BC
Treasures: Rune Blade, Aeon Suit, Aeon Helm, Star Sword, Shock Wave, SonicArrow, Demon Hit, Kaiser Arm, Magic Tab, Elixir

Last Village - City - 12,000 BC - Free Inn
For Sale: Tonic, Mid Tonic, Full Tonic, Heal, Revive, Shelter, Ether
Treasures: Magic Tab

Blackbird - Dungeon - 12,000 BC
Treasures: Your first character's equipment, your second character's equipment, your third character's equipment, your items, your money, Magic Tab

Last Village - City - 12,000 BC - Free Inn
For Sale: Star Sword, SonicArrow, Shock Wave, Kaiser Arm, Rune Blade, Hurricane, Aeon Suit, Aeon Helm, Tonic, Mid Tonic, Full Tonic, Heal, Revive, Shelter, Ether, Mid Ether

North Cape (after the Black Bird) - City - 12,000 BC
Treasures: Magus or Amulet (your choice, but if you save Magus, you'll get the Amulet anyway, since he'll be equipped with it)

Ioka Village (after the North Cape) - City - 65,000,000 BC
For Sale: Ruby Armor

End of Time - City - Free Inn
Treasures: C. Trigger

Crono's House (after you get the C. Trigger) - City - 1,000 AD
Treasures: Clone

Death Peak (after you get the 3 dolls) - Dungeon - 2,300 AD
Treasures: Power Tab, Magic Ring, Wall Ring, Giga Arm, BraveSword, StarScythe, VedicBlade, Dark Helm, Memory Cap

Sunken Desert - Dungeon - 600 AD
Treasures: Lapis, Full Ether, Elixir, Aeon Suit, Full Tonic, 5000 G, HyperEther, Aeon Helm, Memory Cap, Full Ether, MuscleRing, Power Tab

Fiona's Shrine - City - 1,000 AD
For Sale: Sight Cap, Memory Cap, Time Hat, Vigil Hat
Treasures: GreenDream

Ozzie's Fort - Dungeon - 600 AD
Treasures: Full Ether, Magic Tab, DoomSickle, Gloom Helm, Gloom Cape, Dash Ring, Sight Cap

Geno Dome - Dungeon - 2,300 AD
Treasures: Treasures: Lapis, MegaElixir, Magic Tab, 15000 G, Full Ether, Power Tab, Magic Tab, Elixir, Lapis, Full Tonic, Full Tonic, 50000 G, Speed Tab, Full Ether, HyperEther, Vigil Hat, Terra Arm, Crisis Arm

Sun Keep - City - 600 AD
Treasures: Power Tab

Sun Palace - Dungeon - 2,300 AD
Treasures: Moon Stone

Sun Keep (after you get the Moon Stone from Porre in 1,000 AD and put it back in the Sun Keep) - City - 2,3000 AD
Treasures: WonderShot, Sun Shades

West Cape - City - 1,000 AD
Treasures: Speed Tab

Choras - City - 600 AD - 10G Inn
For Sale: Tonic, Mid Tonic, Full Tonic, Ether, Mid Ether, Heal, Revive, Shelter
Treasures: Toma's Pop

Choras - City - 1,000 AD - 10G Inn
For Sale: Tonic, Mid Tonic, Full Tonic, Ether, Mid Ether, Heal, Revive, Shelter
Treasures: Tools (after talking to the carpenters in 600 AD then 1,000 AD)

Northern Ruins - Dungeon - 1,000 AD
Treasures: HyperEtherr, Elixir, Power Tab, Magic Tab (you can only get the Elixir and HyperEther if you get them here before you get them in 600 AD)

Northern Ruins - Dungeon - 600 AD
Treasures: Elixir, HyperEther, 1 Masamune 2

Denadoro Mts (after you get the Masamune 2) - Dungeon - 600 AD
Treasures: Gold Rock

Giant's Claw - Dungeon - 600 AD
Treasures: Sight Cap, Power Tab, Full Ether, Power Tab, Blue Rock, ZodiacCape, Lapis, FrenzyBand, Power Tab
Treasures (If you didn't crack certain egg treasure chests in the Tyrano Lair): CeraTopper, Mid Ether, Full Ether, Full Tonic, Mid Ether

Guardia Castle Basement/Courtroom (once you have the Rainbow Shell) - Dungeon - 1,000 AD
Treasures: HyperEther, Elixir, Lapis, Elixir, HyperEther, Lapis, PrismShard, Yakra Key, Chancellor, PrismDress or 3 Prism Helms, PrismSpecs (if you have the Sun Stone), Rainbow (if you have the Sun Stone)

Black Omen - Dungeon
For Sale: Mid Tonic, Full Tonic, Mid Ether, Full Ether, HyperEther
Treasures: MegaElixir, 30000 G, Magic Seal, Elixir, Vigil Hat, Nova Armor, MegaElixir, MegaElixir, Haste Helm, ZodiacCape, MegaElixir, Power Seal, Speed Tab, Speed Tab, Elixir, Speed Tab, MegaElixir, Speed Tab, White Rock, MegaElixir