Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

This tiny cottage surrounded by railroads is the oldest surviving structure in Fairmount Park.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

This statue, deep in a Swedish forest, is all alone, just like the renowned recluse would have wanted.

A botched 18th-century canal silenced one of Sweden's most magnificent waterfalls.

An ornate Thai pavilion in the middle of Sweden.

This serene wooded hilltop has a dark history as the climactic point of the Swedish witch trials.

The world's oldest individual clonal tree looks like a wimp despite standing tall for 9,550 years.

Unfortunately, you can no longer spend a night in this single-person treetop hotel.

Crooked windswept pines give this old forest an enchanted and magical look.

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

The world's first ice hotel is still one of the most elaborate and beautiful.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

More than 300 years old, Kyoto's historic "teahouse" still operates as an invitation-only geisha club.