Narrow gorges and deep pools created by long-ago glaciers.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

It is the only marker for one of the most famous hate crimes in American history. There are no other memorials for him in the entire state.

A mile-long audio-guided walking tour preserves an iconic era of Portland soul music.

As the glaciers retreated out of northern Wisconsin, this unique natural wonder was crafted.

A piece of solitude and tranquility in the heart of East Saint Paul.

An underappreciated sculpture garden just a few blocks from the capitol building.

Each of these 87 large stones has a unique message. Together, they form part of the Minnesota Military Family Tribute.

The last SR-71 ever constructed.

Inside this shop, visitors are treated to a unique blend of natural history and art.

Replica of an old Esso filling station, complete with Wayne gravity pump and outhouse.

The storied steakhouse is the last in a long line of Lebanese-owned supper clubs in Tulsa.

This garden is dedicated to a Portland cartoonist who specialized in dark humor.

Thousands of mounted insects, and some live ones, hide within an otherwise ordinary shopping mall.

Once in disrepair, the house where the 1983 film was shot has been restored and turned into a museum.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

This double-arched masonry highway bridge is the only structure of its kind in Minnesota.

Just outside the Ohio Supreme Court sits a testament to justice.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

A monument to the forgotten French explorers and their landmark expedition.

This institution celebrates the happy accidents of uncommon sticktoitiveness.

This plaque marks the spot where the first crossing guards helped get kids safely to school.