The San Juan Botanical Garden, officially known as the Botanical Garden of the University of Puerto Rico, is located in the Caribbean city of San Juan, capital of Puerto Rico. This lush 300-acre (1.2 km2) “urban garden” of native and exotic flora serves as a laboratory for the study, conservation and enrichment of plants, trees, flowers, grasses and many other plants. Seventy-five acres are landscaped and open to the general public as well as researchers.