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

A popular Icelandic children's story comes to life inside this cave.

This monument to one of the largest science fiction games of all time bears the names of hundreds of thousands of players.

The exhibition explores the Icelandic city's Viking Age history.

Iceland's first pagan temple in 1,000 years is underway in Reykjavík.

One of the city’s oldest watering holes was originally the home of a famous James Brown (not that one).

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

Unusual books about food and drink abound in this 19th-century New York townhouse.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

Walk into the 19th century without leaving Brooklyn.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

An old-timey medicine shop that once served Chinese laborers during the Gold Rush is still open for business to this day.

Eclectic collection of dark and macabre antiques.

This former boomtown "island" is now submerged below Folsom Lake.

This museum looks at the history of one of America's most famous prisons and most beloved albums.

This 19th century hydroelectric powerhouse was the first of its kind.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

A monument to a survivor of harsh pioneer life, frostbite, and primitive surgery.

A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.