An institution that preserves the history of institutionalization.

Treehouse motel and treehouse-building school.

Home to items never before seen by the public.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

This historical theme park celebrates all things noodle.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

One street divides a single town that stands in two U.S. states.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

Trade in that pesky human soul for cold-hard circuits.

An ever-evolving wall of graffiti art off East Liberty Street.

The city is full of whimsical portals to another world.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.