From a supper club to a gay bar to an HBO shooting location, this 125-year-old Victorian mansion has lived many lives.

One of the largest publicly funded mural in the country is one city's love letter to itself.

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

Look closely and you’ll notice that the color changes a third of the way up the tower.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

There’s a hidden military meme engraved on the World War II Memorial.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

The United States Capitol's former columns still stand.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

This erect, phallic geological spire wasn't always named so domestically.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

Famously misunderstood wonder of the ancient world

One of the world's tallest flagpoles.

Next to the Malaysian Prime Minister’s office stands this rose-colored mosque.

An exploration of Malaysian heritage through the lens of traditional textiles.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

This massive chapel in the middle of the Indonesian forest is both haunting and fowl.

Vietnam's largest Buddha statue depicts a female sage.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.