A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The yawning maw of this pagan visage is said to bite off the hands of liars.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

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

Eighty million natural history specimens call this gargantuan museum home.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A house carved into a rock in the 1940s.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The first declared National Monument in the United States.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Macabre astrological automaton clock dating to the late 1400s.

Famously misunderstood wonder of the ancient world

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

The fairy tale castle of the "fairy-tale king."

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

Dramatic river bend surrounds a natural red-rocked pedestal.

An artsy hidden staircase leads to breathtaking views of San Francisco.