This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

This fairytale-like structure is the last turf church ever constructed in Iceland.

A deserted hodgepodge of experimental structures designed by nearby university students.

This historic motel standing at the "crossroads of America" offers a radio in every room and was saved by local protesters.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

A slightly surreal menagerie of structures that were lovingly spared from demolition and reconstructed in a field.

The “American Gothic" artist's largest works hang in an Iowa State University library.

The townhouse where the English poet created some of his most influential work has been preserved in tribute.

A Jenga-style cylindrical tower of books that appears to go on forever.

A strange house built only at night, with rumored mystic inspiration.

A 140-year-old castle with underground caves hidden in San Francisco.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

After this one-of-a-kind palace was built the architect's hands are said to have been cut off to keep it that way.

A tiny islet just off Long Island offers a wealth of infectious curiosities.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Community bookshelf of 25-foot-tall book spines.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

An eccentric inventor's castle home with its own indoor weather system.

An unrealized dream to wirelessly electrify the entire Earth.

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

A valley of unique erosion patterns lends to a view like nothing on Earth.

A vast collection of rare books, manuscripts & extraordinary objects illustrating the history of medicine.