Island of San Simón Island

Address: Island of San Simón (Isla de San Simón), Ría de Vigo, Galicia, Spain

Hours: Public (daylight access)

Admission: Free (island park access); some ferry costs may apply

The Island of San Simón (Isla de San Simón) lies in the Ría de Vigo in Galicia, Spain, and is historically distinct for its use and architecture. It forms part of a small island group at the entrance to an inner estuary.

The islands are visited for their historical buildings and heritage rather than large-scale tourism. Over time they have hosted maritime facilities and institutions tied to public health and, in the 20th century, were used for detention and as a prison by state authorities.

Earlier uses included quarantine and maritime support functions linked to Vigo’s port, and 20th-century history left a notable imprint on the islands’ built environment. Today the place is accessed from the nearby coast and maintained with attention to its historical legacy.

Geographically the island cluster sits within the estuarine waters of the Ría de Vigo, off the Galician coast, near the Vigo metropolitan area and visible from surrounding shoreline communities.

• Island structure: The site includes two closely linked islets separated by a narrow channel and has a layered history of maritime and 20th-century uses.

Access is by short boat trip from nearby ports in the Ría de Vigo; check local ferry operators for seasonal schedules and guided tours.

• Combine a visit with the nearby Pontevedra and Vigo estuary sites for a full-day cultural and coastal tour.
• Check tidal schedules for safe landing points; some old causeways and beaches are exposed only at low tide.
• Bring binoculars for the estuary birdlife and scanning the coastline for seals and cetaceans.