This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Located within a historic park, the beacon is the oldest standing structure in Miami.

Former villa and estate of James Deering developed to preserve native tropical forests.

A perfect circle of 24 mysterious holes dates back to prehistoric times.

Years of neglect and nature took a toll on this 19th-century lighthouse.

This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

This former sugarcane transport tunnel is now a portal to a lovely beach.

La Cara del Indio honors the Taíno chief who fought bravely against the Spanish invasion of Puerto Rico.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This colorful gate stands as an entrance to the walled city of Old San Juan.

Invading U.S. troops were first seen from this now-abandoned tower, leading to the Spanish-American War.

Enjoy the waters of this half-moon-shaped natural pool surrounded by breathtaking scenery.

This rock in the middle of a river in Jayuya contains dozens of Pre-Columbian Taíno petroglyphs.

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.

The highest peak in Puerto Rico is home to a rare fern that can only be found on six trees at its summit.

The abandoned remains of this once-thriving hotel looms over the city, awaiting an uncertain future.

These red and black houses were awarded to the firefighters who saved their city from an enormous blaze.

This museum preserves the heyday of Puerto Rican coffee.