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.

Ruins from the Parthenon and petrified wood line the interior of one of the world's most famous monuments.

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

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

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

The walls of the iconic dome are hollow and have a secret stairway.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

Between 1930 and 1946, a tobacco farmer laid his beloved horses and mules to rest in this small patch of pine forest.

The smallest bar in Amsterdam has stayed in the family since 1798.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

A mysterious, abandoned Chinese building in Mexico pays homage to the area's East Asian immigrants.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

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

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A monument to the 17,000 Chinese who worked and died to build Canada's Pacific Railway.

Willy Wonka would love this weird half-a-home.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.