The Dominican Republic is the most visited destination in the Caribbean. The year-round golf courses are major attractions. A geographically diverse nation, the Dominican Republic is home to both the Caribbean's tallest mountain peak, Pico Duarte, and the Caribbean's largest lake and point of lowest elevation, Lake Enriquillo. The island has an average temperature of and great climatic and biological diversity. The country is also the site of the first cathedral, castle, monastery, and fortress built in the Americas, located in Santo Domingo's Colonial Zone, a World Heritage Site.