Once the future of underwater combat, this old sub is now open for visitors to muck around in.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

Erroneously called the world's tallest flagpole, this landmark is devoted to "good neighborliness."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

This massive crater in the middle of nowhere was used to train astronauts for moon landings.

A vertically floating hemlock controls the waves and weather at Crater Lake.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

A Saint Nicholas-themed ghost town in the Mojave desert.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

Collection of vintage trailers double as hotel rooms.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

Ancient pueblos built into the base of a natural canyon wall.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

This giant steer-skull edifice refuses to die.

Stairs often replace streets on the steep slopes of this old mining town.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.