Fall through a crack in the seams of reality at this immersive art installation.

With over 5,000 champions, the Hall of Fame continues to draw amateur eaters.

The museum moved on, but the diorama remain.

At HopCat, a marker honors fictional creatures with the ability to travel the missing dimensions of Kcymaerxthaere.

In Grand Rapids, Michigan, a marker honors the creation story of a proud fictional culture.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

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

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

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.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

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

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.

This statue of the "father of television" stands prominently in the United States Capitol.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

This groundbreaking 16th-century map is known as "America's birth certificate."

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

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

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.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

Atop this media building, two hives containing more than 30,000 bees keep the surrounding area vibrant.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.