One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

Bug-devouring flora are the stars of a special wing of the glass conservatory.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

A large instrument played by the wind.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

A huge musical instrument played by the ocean.

Carved faces add a touch of magic to this island's impressive oak trees.

This small cemetery is all that remains of Atlanta's first Black communities.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

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

Abraham Lincoln's likeness rests at the top of this giant totem pole.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

This historic hotel invented the chocolate brownie.