10 Los Sitos Interesantes: Viejo San Juan: narrow streets lined with brightly colored houses with balconies. Mimics architecture of Southern Spanish cities.
11 El Castillo de San Felipe del Morro: Originally built as a fort by the Spanish in 1539 to defend the island.
12 El Yunque: The only tropical rain forest in the care of the U. S El Yunque: The only tropical rain forest in the care of the U.S. Forest Service. The park has many waterfalls and is home to the “coquí”, a tiny tree frog named for it’s distinctive song.