Forte de São João Baptista

The fortress offers a rare blend of stark, military architecture and raw, natural beauty. Being surrounded by the deep blue Atlantic in a designated UNESCO World Biosphere Reserve provides an unparalleled sense of solitude and historic grandeur that mainland castles simply cannot replicate.

Those prone to severe seasickness should reconsider, as the boat trip from Peniche can be extremely rough. If you lack interest in rugged coastal landscapes or have very limited time, the logistical effort to reach the island might outweigh the experience.

Explore the stone corridors and ramparts of the fort, take in the panoramic views of the Atlantic, and hike the short, steep trails surrounding the fortress to observe the island’s unique endemic flora and nesting seabirds.

Commissioned by King John IV in 1651 to defend the coast against pirate raids and foreign incursions, the fortress was built using the ruins of an older monastery. It survived multiple sieges and later served as a strategic military outpost before being converted into a rustic guesthouse.

Access is exclusively via ferry from Peniche harbor. Tickets must be booked in advance, as boat capacity is strictly regulated by park authorities.

The site is entirely pedestrianized and requires climbing uneven stone stairs and steep, unpaved coastal paths.

The biggest mistake is failing to check local weather forecasts; if the sea is too rough, the boats are cancelled regardless of your reservation. Additionally, visitors often forget to bring adequate sun protection and water, as services on the island are extremely limited.

Travelers with mobility issues, small children, or anyone sensitive to boat travel and isolation.

The fort offers very basic, spartan accommodation for those wanting to stay overnight; otherwise, day-trippers must return on the scheduled afternoon ferries. Wear sturdy footwear with good grip.