An island filled with hundreds of hanging, decomposing, decapitated dolls.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The United States Capitol's former columns still stand.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

A trash dump made beautiful by nature's power.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

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

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

On this Puerto Rican island, many abandoned naval ammunition bunkers sit open while a few have been padlocked by locals as personal storage.

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

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

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

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

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

The world's second largest single-dish radio telescope, once used to contact E.T.

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

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

Giant jewel-toned statues fill the grounds of this Cambodian Buddhist temple in California.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.

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

A macabre tour of Hollywood’s deadly history.

This 20th-century mansion plays a key role in one of Puerto Rico's greatest novels.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.