This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

Medicinal spa created with the discharge from a geothermal energy plant.

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

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

The largest earthwork effigy in the world.

Shoreline strewn with the remains of ghostly fallen trees.

Stroll through a wonderland of stupendous moss-covered trees.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

This bridge was constructed from the rubble of the infamous Bastille.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

It would take 35 firetrucks to fill this enormous glacial pothole.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

This park contains a number of standing stones meant to heal and inspire.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

In which a local geological marvel becomes a quaint roadside attraction.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.