Puerto Rico is a Caribbean island that is a self-governing commonwealth of the United States of America. Located in the Caribbean Sea to the east of the Dominican Republic and west of the US Virgin Islands, Puerto Rico lies on a key shipping lane to the Panama Canal, the Mona Passage.
Christopher Columbus landed on the island of Puerto Rico in 1493 on his second voyage of discovery, and originally named it San Juan Bautista in honor of Saint John the Baptist. The name of the island's present day capital, San Juan, honors the name Columbus first gave the island. It was then settled by explorer Ponce de Leon, and the island was under Spanish possession for over four centuries. Puerto Rico became United States territory under the Treaty of Paris, which also ended the Spanish–American War.