The Casa de Colón occupies a restored colonial building a short walk from the waterfront and tells the story of Columbus's connection to La Gomera in a measured, well-assembled way. The displays cover the political and navigational context of the 1492 voyage, the fleet's composition, and the island's role as a provisioning stop — a role San Sebastián played three times over as Columbus returned to the Americas on subsequent expeditions.
The museum is small enough to cover in under an hour. Maps, models, and period documents give it substance without becoming overwhelming. Outside, the Plaza de las Américas in front of the adjacent Iglesia de la Asunción forms a pleasant square where you can sit after the visit and look out over the bay that Columbus departed from.