From Bulbapedia, the community-driven Pokémon encyclopedia.

Cerulean Cape is the unofficial name given to the northeastern-most point in the region of Kanto located at the east end of Route 25. This location is home to Bill in the Sea Cottage (in the games) or Bill's Lighthouse (in the anime) and is a popular spot for trainers and tourists alike.

Area locations

• Sea Cottage/Bill's Lighthouse
• Route 25 (official name of the area)

Trivia

• Misty, the Gym Leader in Cerulean City, likes to bring her dates to the cape on the east side of Route 25. One such date was interrupted in Generation II when the main character encountered Misty at the land bridge between the two ponds following the restoration of power to Kanto.
• In Generation II, the Sea Cottage is one of the few areas where Evolutionary stones are available.
• This area was featured in episode 13 of the original anime series, Mystery at the Lighthouse.