A spiritual vortex among the red rocks in Sedona.

This 1930s log cabin began as a taxidermy museum but is now a popular country music venue.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

The remains of a large iron mill that once stood in the remote woods of northern Maine.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

A tribute to Ponce de Leon's supposed quest for eternal youth.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

A historic landmark and museum filled with curious objects representing the history of Key West.

The museum chronicling a treasure hunter's dream, fulfilled.

A historic presidential getaway on the continental United States' southernmost island.

The highway's southernmost spot is a beloved local attraction.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

This steamer is known as "The ship that built Cleveland."

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

An ever-evolving wall of graffiti art off East Liberty Street.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Strange physical sensations and optical contradictions keep visitors coming back for more.