San Juan is the capital and most populous municipality in Puerto Rico, an unincorporated territory of the United States. In 1508, Juan Ponce de León founded the original settlement Caparra. San Juan, as a settlement of the Spanish Empire, was used by merchant and military ships traveling from Spain as the first stopover in the Americas.
San Juan has a tropical climate and enjoys an average temperature of 79.9 °F (26.6 °C) although 90 °F (32 °C) or higher temperatures are often felt during the wetter months of the northern summer, especially if the winds come from the south.
Today the capital features numerous hotels, museums, historical buildings, restaurants, beaches and shopping centers. In San Juan there are numerous tourist attractions, including: Old San Juan, Ocean Park, Isla Verde and Condado.
Places and monuments emphasized in tourism campaigns include: Old San Juan, promoting the historic nature of its colonial buildings and narrow streets covered by adoquine, a blue stone cast from furnace slag; they were brought over as ballast on Spanish ships.