Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This 36-foot-tall bronze Lady Liberty holds a real flaming torch.

Underneath this water pump, Annie Sullivan helped Keller speak her first words.

This 880-acre facility is home to a massive collection of vintage motorcycles and cars, as well as a 2.38-mile race course.

The permanent home of a 1960s traveling museum of tiny historical dioramas.

Founded by a man who called himself the greatest hunter alive.

Since it formed millions of years ago, this cave system has been a sacred burial ground, a Prohibition-era speakeasy, and the center of an amusement park.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

This space rock fragment is one of the only meteors to have ever struck a human.

Tucked away atop a quaint Alabama pharmacy is this tiny display of antique medical tools.

The former home of the hard partying literary power couple is now one of the only museums devoted to their story.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

A wealth of local folk art, antiques, and curios, without ever leaving your car.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

Monasteries on rock pillars, once accessible only by frayed ropes.

The hallucinogenic center of the ancient world.

Tubing through a cave lit with glowworms is a magical underground experience.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

These eerie outliers of the lightning bug family glow a mysterious blue color.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Bioluminescence in the reefs of the Maldives causes the sea to glow like a starry night sky.