Ride a steep cable car alongside a tall waterfall that feeds a near century-old power plant.

Marine fossils from the Devonian period are exposed at this park.

A former pyramid-shaped library with colorful murals lies just across the bay from Old San Juan.

Built some 700 years ago, this Taíno ceremonial site features ball courts, petroglyphs, and evidence of ancient astronomy practices.

Deep in the Ocala National Forest, a lonesome 19th-century grave.