One of the best examples of Art Deco architecture in the United States.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

The first American woman to win the Nobel Prize in literature came from the foothills of Appalachia.

A cult archaeology conspiracy theory claims these West Virginia petroglyphs were written by Irish monks in Ogham.

Home of a 28-foot tall stalagmite known as the War Club.

On a wall in Cleveland, Ohio find the story of a highly connected fictional community of organisms that created remarkable, lasting structures.

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

The rustic cabin-like decor of this Arts and Crafts-style church reflects the love of nature central to its little-known theology.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

A museum befitting the city responsible for supplying the majority of the world's LSD.

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

This doorless 20th-century elevator doesn't stop or slow down.

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

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

The oldest garden in Prague, once part of an medieval orchard.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Microscopic scenes; some call it novelty, some call it art.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.