Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

America's most famous piece of self-built architecture.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

A building facade covered with the statues of 11 giants of Tajik literature.

The first version of this stalwart construction appeared around 3,000 years ago.

The world's second-tallest flagpole stands proud despite dropping rank.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

The West's first incursion into the Afghan world lies buried beneath a military base.

This magnificent blue mosque in Afghanistan is surrounded by thousands of white doves.

Once an impressive link to Afghanistan’s Buddhist past, now a sad reminder of intolerance towards other cultures.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

Home of the infamous Rug Man of Doha.

This road earned its macabre nickname after hundreds of Iraqi troops died along it in 1991.

Kuwait City's uniquely designed water towers look straight out of a retro sci-fi cityscape.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.