Lying on the northwestern-most point of the islet of Old San Juan, Castillo San Felipe del Morro is named in honor of King Philip II of Spain. The fortification, also referred to as el Morro or 'the promontory,' was designed to guard the entrance to the San Juan Bay, and defend the Spanish colonial port city of San Juan from seaborne enemies.

In 1983, the citadel was declared a World Heritage Site by the United Nations in conjunction with the San Juan National Historic Site. Over two million visitors a year explore the castillo, making it one of Puerto Rico's leading tourist attractions. Facing the structure, on the opposite side of the bay, a smaller fortification known as El Canuelo complemented the castillo's defense of the entrance to the bay.

Do you have goosebumps yet? El Morro is one of the oldest and most haunted spots in Puerto Rico. Built in the 1500's, El Morro is a series of forts overlooking the San Juan Bay. This area is notorious for sightings of a spirit of a woman that chillingly glides along the ramparts, dressed in all white. Moans of fallen soldiers can be heard, and the ghosts of old prisoners have been seen hovering along the grounds of El Morro. These frequented grounds are a playground for the departed.