Imagine a place where history is literally hidden beneath the feet of modern city dwellers. Castillo de San Cristóbal was the first significant fortress on the island of Tenerife, built back in 1575. Located in the city of Santa Cruz de Tenerife, this fortification served for centuries as the main shield of the bay and the residence of the high military command until it was demolished in the early 20th century.

Today, this site in Spain is a unique underground museum—an interpretation center located right beneath the city's main square. Here, fragments of the original walls and bastions, which were accidentally discovered by archaeologists in 2006, have been preserved. It is a must-visit for anyone wanting to understand how a small port transformed into a powerful maritime fortress.
The museum's main treasure is the legendary bronze cannon known as "El Tigre" (Cañón Tigre). This 18th-century weapon, weighing two tons, became famous because, according to historical lore, it was the one that seriously wounded Admiral Nelson during his failed attempt to capture the island. A visit to Castillo de San Cristóbal allows you to touch the living history of Tenerife in the very heart of its capital.