10. Hike through a cloud forest in Puerto Rico Puerto Rico has only a small rainforest in a small area of the El Yunque National Park. Unique to the park is a cloud forest, an area of tropical jungle adapted to life at high altitude and abundant rainfall. El Yunque is a very gentle forest. So gentle that there are no poisonous snakes! If you ever needed a reason to protect the earth’s natural beauty, a hike in the Puerto Rican rainforest will convince you it’s the right thing to do.