San Juan, Puerto Rico
Construction of El Fuerte San Felipe del Morro or just El Morro, was started in 1540 to protect the coast from invading enemies. The fort is the main attraction of Old San Juan and is a UNESCO World Heritage Site. The 16th century citadel is monumental in size and breathtaking to look at. The grounds that surround it make it an even more majestic place. The views are grand and the amount of history that is hidden inside should suffice you if considering a visit.