San Juan is the capital and largest city on Puerto Rico’s northeast coast. San Juan, Puerto Rico’s capital, offers a busy nightlife, numerous casinos and clubs, and is adjacent to some of the island’s top all-inclusive resorts. San Juan, often known as La Ciudad Amurallada (the walled city), is Puerto Rico’s most important seaport as well as the island’s manufacturing, financial, cultural, and tourism centers. San Juan has various historical buildings, including Spanish military forts built from the 1540s to the 1800s, such as Fort San Felipe del Morro, Fort San Cristóbal, and La Fortaleza. It has beautiful beaches, hotels, plazas, historic monuments, museums, and a lively harbor, which is one of the greatest in the Caribbean.