The Hudson River School comes alive at this palatial estate.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Breathtaking and huge 430 year old maps of Italy.

The largest tea plantation in Southeast Asia supplies gorgeous vistas alongside tea for the surrounding countries.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

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

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

New Orleans' famous cemetery, located on the site of a former race track.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

"A hideous albatross in the Hudson River Valley."

Jumping-off point for a climb up Mt. Everest is the most dangerous airport in the world.

While it now takes more than a dime to open an account this historic Brooklyn bank still displays the opulence of the gilded age in which it was built.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

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

Go inside to really appreciate this 500-year-old technological masterpiece.

Water and windows define this defensive Italian well.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

The final resting place of New Orleans' most famous voodoo priestess.