A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

A restaurant and lodge in northern Wisconsin which served as a clandestine hideout for John Dillinger and featured one of the most famous botched FBI raids in history.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

This tiny site in Iowa, part of a patchwork national wildlife refuge, is home to ancient flora and fauna.

How did the 110-ton limestone statue cross the road?

A unique geological area spiked with wind-carved rocks that resemble teepees.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

A geological mystery on Camelback Mountain.

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.

Home with Gothic windows featured in a famous painting.

While there are no actual snakes in the history of this crooked road, there may be a number of dead horses.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A magnificent, reportedly haunted mansion built for a composer by Spiritualists.

This historic graveyard was partially paved over to create a streetcar line.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.