In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

The only Leonardo Da Vinci painting in the Western Hemisphere.

Dedicated to one of Spain’s most talented painters and also one of the least known.

Hundreds of large Russian nesting dolls decorate this square, and the largest is a functioning hotel.

Vintage furniture and art share space with all manner of collectibles at this quirky shop in Bangkok.

An abandoned castle owned and ignored by Masons carries a cursed history.

The largest known open fault in the United States is basically a giant natural refrigerator.

The remnants of a luxurious resort that saw its peak in the 1970s and 1980s has been abandoned since 2009, leaving behind the wreckage of both the hotel and a beautiful ice skating rink.

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.

The lost town of Neversink, sunk by New York City.

This Central New York ghost town was once a prosperous railroad community.

A former hardware store near Yerba Buena is the official home of California's history.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

The last used bookstore in Downtown San Francisco is one of the smallest bookstores just about anywhere.

Faceless white figures loom over the city from the rooftop.

In the basement of a San Francisco performing arts center, a small museum dedicated to the history of showgirls.

One of the last remnants of the city's Chinese nightclub scene is now a dive bar selling killer mai tais.

With the touch of a button, you can read a randomly selected short story.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

The largest whiskey stash on the West Coast survived the 1906 fires--but not without heroic effort.

These six walrus head statues harken back to a time when this area wasn't far from the oceanfront.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.