Access to:
Accessible in the city: Icefall Cave
Accessible from the city (via the Seagallop Ferries): Vermilion City, One Island, Two Island, Three Isle Port, Five Island, Six Island, and Seven Island

Places of interest:
Day Care: The Day Care located here can raise two Pokémon, allowing the player to receive Eggs, unlike the Day Care on Route 5.
Move Tutor: A man on the island can teach one Pokémon Body Slam.
Lorelei's House: Lorelei lives in the eastern house. She has six Pokémon dolls in her house, and will gain one more for every 25 times the player defeats the Elite Four, up to 200 wins for a maximum of 14 dolls.
Braggart's House: The man in the house next to the Poké Mart will give out Trainer Card Stickers when the player reaches certain requirements. For the highest levels, the player needs to beat the Elite Four 200 times, hatch 300 Eggs, and win 100 Link Multi Battles.

Utility:
Surf is required to access Icefall Cave, as well as a Stardust. Wild Pokémon can also be encountered here with Surf.
Rock Smash is required to access a Star Piece.