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

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

Plot your trip through the city on the sidewalk.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

A historic covered bridge, only one of two remaining in North Carolina.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

The final resting place of a space program monolith.

New Orleans' famous cemetery, located on the site of a former race track.

The largest drain hole in the world.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

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

An acoustic anomaly with a mysterious cause.

San Francisco's newly reopened hands-on science museum.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

New York City's smallest piece of private property.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.