The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

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

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

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

This locally-famous crevasse in New York State is icy all year round.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

See wolves, coyotes, and arctic foxes in a natural environment smack in the middle of New York State.

Believed by many to be the oldest surviving public monument in the United States.

The oldest covered railroad bridge still standing in the United States.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Designed as a place for patients to take in the scenery, this tower has a dark history.

This elaborate High Victorian Gothic structure is one of the world's few 16-sided buildings.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.

This Gothic castle was inspired by Erik the Red's Viking residence at Brattahlid in Greenland.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

A showcase of geologic history is home to one of the largest collection of lunar meteorites on Earth.

This 150 foot seven-tiered cascading waterfall is one of the hidden gems of the White Mountains.

A very big rock just plopped down in the New England woods.

After the state would not recreate this beloved rock formation, three New Hampshire brothers took things into their own hands.

Beautiful natural falls where Satan once ruined a pot of beans.