A visit to the Santa Bárbara Castle is highly recommended. Located atop Mount Benacantil, at a height of 166 metres, it is one of the largest medieval fortresses in Spain, with unbeatable views over the Bay of Alicante and on clear days you can see all the way to Tabarca Island. Such is its relevance that during the 20th century it was declared a Monument of Historic and Artistic Importance and a Site of Cultural Interest. Here we can also find one of the most characteristic images of the city, a rock formation resembling a man’s profile on the southwestern slope, known as the Moor’s Face, which is best viewed from Postiguet Beach. The Museum of the city in Santa Bárbara's Castle “MUSA”, housed in the Castle itself, was included in its cultural offer and it explains in five theme rooms the history of the city of Alicante and their inhabitants. To descend down from the Santa Bárbara Castle, take the route through Parque de La Ereta, along the mountainside. Its location and views transform it into a place of relaxation as well as a great meeting place. It also has a spectacular restaurant and, on the way down to the old town quarter, you can visit the picturesque, quintessentially Spanish Santa Cruz district. Another attractive option between the castle and the Santa Cruz district is walking along the remains of the walls that surrounded the Castle, which now end in the Santa Cruz district. Visitors can also access the castle via a lift built within the rock face opposite El Postiguet beach.

Build in the 1670s as the administrative centre of the island and military grounds, the bright red Fort Christian now hosts the St Thomas museum. Explore the old photos, antique furniture and artifacts connected to the history of the island.

While there's plenty to so in Charlotte Amalie on land, it would be a great loss not to explore the underwater wonders of the U.S. Virgin Islands. The easiest thing to do is rent a snorkel and explore the shallow waters by the beach, but you should definitely consider trying something more advanced at least once. Snorkelling is the cheapest choice. Add some diving equipment to go deeper and see more. Some tours now offer Sea Trek helmets — a modern take on the diving helmet. No matter your choice of equipment, do explore the coral reefs that are home to tropical fish such as snapper, hamlets, parrot fish, sturgeon, squirrel fish and majestic sea turtles.