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

Puerto Rico's oldest rum producer started its 140-year-old business with "a little barrel."

The location of Puerto Rico's first water bottling plant, thanks to a collaboration between Mother Nature and technology.

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

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

This small primate research island is teeming with playing, fighting wild monkeys.

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

The world's brightest bioluminescent bay.

This apartment is a true time capsule of local life in Bulgaria during the Soviet regime.

The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.

Mysterious standing stone formations looks like a petrified forest.

Eastern Bloc nostalgia, anybody?

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

A spectacular Bulgarian cave resembling a devil's head with a waterfall rushing down its throat.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

The first lookout in Yosemite.

An expansive and intricately restored mansion remains from over a century ago--and so do its ghosts.

Built to hold Gold Rush wealth, this building has withstood the test of time.

Bits and pieces from the ill-fated Donner Party's winter cabins.