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

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

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

The Decoy Capital of the World.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Walk through the history of American pop culture.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

The slate extracted from these Pennsylvania quarries was once hailed as the finest in the world.

The first of Lancaster's "rural cemeteries."

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

One of the oldest Catholic churches in the U.S., situated just east of Gettysburg.

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

A museum and research center dedicated to preserving the history of Rolls-Royce and Bentley motorcars.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

After covering almost 1.5 billion acres, the survey's still not finished.

A storybook church made from a mesmerizing medley of multi-colored stones.

This colorful West Virginia cowboy greets passersby with a glassy stare.

This massive airship factory is so large that it has its own indoor weather.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

The crash of this great airship signaled the beginning of the end for dirigibles.