Genesis of modern hydroelectric power.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

An abandoned tuberculosis hospital moulders on into an uncertain future.

A collection of unique outdoor sculptures surounded by the beauty of nature.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

Why have you never heard of the second most popular tourist site in New York?

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

The only boathouse Frank Lloyd Wright ever designed was also the only unbuilt structure in his famous Wasmuth Portfolio, until 2007.

The absurd creation is a compulsory destination for selfies in Buffalo.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Five candy-colored villages on the Italian Riviera.

The site of a tragic massacre that spawned a multimedia franchise.

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

This once luxurious Catskills resort is now a haunting ruin.

This historic fort spans more the 300 years.

In the recreated studio of a visionary artist, a stone that may be more than meets the eye.

A waterway covered over after the Industrial Revolution has been unearthed and cleaned up, for the enjoyment of fish and humans alike.

This institution pays tribute to an associate justice who protected civil rights and prosecuted Nazis.

A quaint village in Western New York named after Alexander Hamilton's beloved sister-in-law.