A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

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

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

This singular art museum in São Paulo is unique inside and out.

This park feels like a lush little jungle full of wildlife nestled within São Paulo.

This public elevator links the lower city to the upper city of Salvador.

This 17th-century Portuguese fort now houses a nautical museum.

A Tudor-style castle in Brazil holds one of the world's largest armory collections.

This haunting sculpture stands as a memorial to the torture victims of the Brazilian military dictatorship.

This monument claims to display the first pot used to cook a famed Southern stew.

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

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

An overlooked memorial honoring the local Washington residents who died in World War I.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.

The former home of one of America's greatest short story writers is home to an annual pun competition.

A tribute to the "toughest woman on the Texas frontier," who survived a famous battle and five husbands.

Just like the real 36th president of the United States, animatronic LBJ amuses visitors with jokes and stories.

Locals dubbed it the "Owl Building" because of its bird-like appearance.