Thishalf day adventureis an unforgettable tour into the interior of the only tropical rainforest in the us forestry system locally known as the el yunque national forest 28 000 acres of lush plants hardwood trees cloud forests dwarf forest rivers waterfalls birds insects lizards and beautiful flowers along with a rich culture and historical background make for a breathtaking rainforest tour and hike theguides will teach you about puerto rico rainforest facts flora fauna history