Treehouse motel and treehouse-building school.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

This interpretive path lets you get up close and personal with dinosaur bones.

It would be easy to walk past this unusual piece of art and have no idea it pays tribute to the odd life of a real chicken.

The holiday spirit lingers year-round in the "Christmas City of the High Plains."

This artsy public restroom is shaped like a giant john.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

Abraham Lincoln's likeness rests at the top of this giant totem pole.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

This striking art museum holds an amazing series of curiosity cabinets.

Statue dedicated to the star of an old television show.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

A bizarre house filled with an astounding array of collections.

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

Tirelessly maintained by a Wisconsin man named JFK.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.