San Juan, officially Municipio de la Ciudad Capital San Juan Bautista (Municipality of the Capital City, Saint John the Baptist), is the capital and most populous municipality in Puerto Rico, an unincorporated territory of the United States. As of the 2000 census, it has a population of 658,304 making it the 42nd-largest city under the jurisdiction of the United States. San Juan was founded by Spanish colonists in 1521, who called it Ciudad de Puerto Rico ("Rich Port City"). Puerto Rico's capital is the second oldest European-established city in the Americas, after Santo Domingo, in the Dominican Republic. Several historical buildings are located in San Juan; among the most notable are the city's former defensive forts, Fort San Felipe del Morro and Fort San Cristóbal, and La Fortaleza, the oldest executive mansion in continuous use in the Americas. 

One of the major tourist areas in St. Lucia, Castries, is a port of call for cruise ships. They dock at Pointe Seraphine, to the north of the harbour, which is also a duty-free shopping centre. Beaches are also a major draw for tourists, and there are several in or very near Castries. The city doesn't have a huge amount to offer visitors, and it's usually just a place that you'll pass through on your way to the more obvious attractions of Saint Lucia - but it's worth watching those marvellous cruise ships that visit Saint Lucia dock!