The 28-foot granite map plots the locations of 40 theaters in New York City.

An unassuming secret door once led to a legendary watering hole.

An eclectic collection of artifacts from the Wild West is preserved in a remote fictional pioneer town.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

The fifth-longest natural arch in the world, and the longest outside China.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

The Kalamazoo factory has 100 years of instrument-making, and one big wartime secret.

From working out of his garage to the James Beard semifinals, one Tucson baker has kept his fan base—and his grains—local.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.

An 18-mile-long tunnel for sewage waste will soon wind within the bowels of Washington, D.C.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

An Industrial Revolution-era public work that purified water using nothing but sand.

Rising from the sea like a stone monster.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

The most powerful waterfall in all of Europe.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

Home to three historic ships from the age of Vikings.

An intricately carved Viking church overlooks a glistening fjord.

This controversial, abstract sculpture is meant to represent an Aztec warrior.