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

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

Walk in the footsteps of the gods and straddle two tectonic plates.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

A winding, blood-red tunnel of hardened lava navigable by foot.

Enormous one time fiber mill now houses local artists and small businesses.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The Hudson River School comes alive at this palatial estate.

The world’s first penitentiary, meant to be humane, drove men insane.

A world-class collection of mechanical musical instruments and automata.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Once called Winthrop Park in 1889, home to a decidedly sexy tribute to the Monitor vs. Merrimac battle.

Memorial to the 137 lives lost on a ship fire, the whole hulk of which washed up on the Asbury Park shore.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

A Prada store in the West Texas desert that is never open for business.