Fortaleza do Pico

Fortress in Funchal

Easy to spot, but taxing to reach, it's worth the slog up to this rocktop fortress northwest of the city centre for the stupendous views. Built in the 17th century as a surveillance point, the building has been Portuguese navy property for the last seven decades (hence the out-of-bounds zones). Undervisited, it's a quiet, if sometimes windy, picnic venue.