Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

Nondescript building owned by ExxonMobil working on siphoning Greenpoint Oil Spill out of the ground.

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

America's post-nuclear-attack chambers of Congress.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

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

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

A modern mechanical planetary system, part of a 10,000 year clock.

A monumental cross hides in the trees in Golden Gate Park.

Hollowed out cedar log tubs set in an ancient towering forest.

An enormous park-like oasis, full of famous Chicagoans' graves.

A New England curiosity cabinet, one hundred years on.

Mysterious rocks that ring musically when struck.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

The Decoy Capital of the World.

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

Now containing the bones of the actual conquistador, instead of someone else.

An ancient knight and a symbol of the city's freedom.

A tiny church on a man-made island in the Adriatic.

The place where World War I began.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

One man's quest to save his town with a trail of record-breaking sculptures.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

A vertically floating hemlock controls the waves and weather at Crater Lake.