The first declared National Monument in the United States.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Dramatic river bend surrounds a natural red-rocked pedestal.

A bizarre house filled with an astounding array of collections.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Electrical pylon in the shape of Disney's beloved mouse.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

A swamp that was the site of prehistoric water burials also managed to preserve its corpses for millennia.

A building so large that it has its own weather.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

A unique book shop with a collection of rare tomes and a nostalgia museum.

Washington's iconic carousel has a nice piece of Civil Rights history.

The eccentric mansion of one the most popular horror authors of modern times.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

Once featuring over 60 miniature replicas of famous Chinese locations, the Splendid China theme park was completely abandoned and is now mostly rubble.