Home to items never before seen by the public.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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

A mysterious castle built as a monument to lost love.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A bizarre roadside attraction and the first instance of miniature golf in the world.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The famous winding walk at Chartres is surrounded in mystery and myth.

Northern Ireland's Brobdingnagian stepping stones.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

Famously misunderstood wonder of the ancient world

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."