Encompassing 28,000 acres, El Yunque National Forest is the only tropical rain forest in the entire U.S. National Forest system — thanks in large part to its location on the slopes of the Sierra de Luquillo Mountains in the northeast corner of the island. Towering above the park, the peaks of this range reach over 3,537 ft above sea level. And since it’s been protected as far back as 1876, the park holds another uncommon distinction as the oldest reserve in the Western Hemisphere. So much uncommon goodness in one place!