Old San Juan is a historic district located at the "northwest triangle" of the islet of San Juan in San Juan.
Castillo San Cristóbal is a fortress in San Juan, Puerto Rico. It was built by the Spanish to protect against land-based attacks on the…
圣卡罗斯城堡 是古巴首都哈瓦那的一座军事要塞，修建于18世纪。这座城堡是美洲第三大要塞。1982年，这座城堡作为哈瓦那旧城的一部分被列入世界文化遗产。
Dating back to 1610, this stately and perfectly preserved fort is well worth exploring. It also offers amazing views!
