Europe's second largest ossuary wasn't discovered until 2001.

A virtually untouched "home on the hill" for the flora and fauna of Rhode Island.

A giant green dragon crawls down from the roof of the Providence Children's Museum.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

Books bound in human skin and H. P. Lovecraft's letters are among a few of the treasures this library has to offer.

This blue behemoth of a bear is a colorful homage to Brown University's mascot.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

The Burnside Fountain and its questionable interpretation.

The monumental steeple on Amherst College's campus has no church attached to it.

The largest collection of historic military firearms in the United States.

At this farm in upstate New York, the former president plotted his reelection campaign.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

Created by four famous men (Henry Hobson Richardson, Frederick Law Olmsted, Calvert Vaux and Thomas Story Kirkbride), the beautifully designed Buffalo State Asylum was resurrected as a hotel and art center...but still boasts a ghost story or two!

The library of every book lover's dreams.

This collection started by a Cornell professor once held more than 600 human brain specimens, including the one that belonged to its founder.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

The little-known final resting place of one of America's greatest writers.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

The home, museum, and death site of Kodak's influential founder.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

This 19th century cyclorama acts like an analogue time machine to a different era.