Macabre astrological automaton clock dating to the late 1400s.

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A floating cat sanctuary on an Amsterdam canal.

The ruins of the northernmost pueblo in the Americas tell the story of a mixing of native cultures.

This roadside prairie Statue of Liberty replica is one of the foremost examples of the Boy Scouts of America's "Strengthen the Arm of Liberty" campaign.

This lesser-known geographic marker was the reference point for all surveys of the continent for 75 years.

Kansas's Grassroots Art Capital welcomes visitors to Lucas through its very own World's Largest Thing.

In this rural town square, a unique statue honors the inventor of the microchip.

This 41,000-acre wetland complex is the largest marsh in the interior of the United States.

A preserved relic of the 1904 St. Louis World's Fair and a center of Swedish American Culture.

Salina's eye-catching giant mural depicting children at play is painted atop a century-old mill elevator.

This rural roadside cross marks the farthest point of Coronado's expedition, and the place where the Catholic faith first came to America.

A museum chronicling pioneer life constructed over Interstate 80.

This replica small town lets visitors take a stroll through the story of progress in the U.S. via thousands of Americana artifacts.

An experimental, automotive replica of Stonehenge.

America's largest man-made forest was planted in an effort to bring back the past.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The highest bridge in America was built for an almost unnervingly small amount of money.

This golf ball–shaped former desert real estate office now houses a UFO museum.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.