Castillo de San Juan Bautista (Castillo Negro)

The Castillo de San Juan Bautista, or "Black Castle," is a historic gem by the sea in Santa Cruz. Built between 1641 and 1644 as a key defensive fortress for the city, it was rebuilt in 1765 to strengthen its structure against the onslaught of the ocean. It is the best-preserved of the island's castles, built with volcanic stone and walls up to 1.5 m thick on a circular plan about 30 m in diameter.

With direct views of the Atlantic and flanked by parapets with loopholes, the tower houses up to five artillery pieces. Inside, there were officers' quarters, gunpowder stores, and living quarters for soldiers.

During the famous Battle of July 25, 1797, which symbolizes the heroic defense against Admiral Nelson's British attack, the Black Castle was part of the coastal defense system, although it is said to have fired only four cannon shots during that episode. Even so, its historical imprint has remained in the island's collective memory.

In 1948, it became a military museum, although it has been managed by the City Council since 1982. It's currently not open to visitors, but its preservation is excellent, and the surroundings invite a stroll: next to the César Manrique Maritime Park and the Auditorium, surrounded by restaurants, a park, and sea views.

Getting there is easy: it's right in the center, on Avenida de la Constitución, a few minutes' walk from Plaza de España. You can walk around it and admire it in detail, especially with the contrast of the modern auditorium behind it. It's an ideal place for those who enjoy combining history, defensive architecture, and uncomplicated coastal walks.