Commonly referred to as the most photographed Victorian home in the United States.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

A toxic ghost town sitting atop a massive coal fire.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

The largest self-built castle in the U.S., six decades in the making.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The hallucinogenic center of the ancient world.

A 20-meter (65-foot) robot towers over Tokyo Bay.

A mysterious echo seems to defy the laws of acoustics.

An acoustic anomaly with a mysterious cause.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

A marvel of Byzantine engineering under the streets of Istanbul.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

A 70-foot-deep ice cave formed by lava from Mt. Fuji on the edge of Japan's "Suicide Forest." 

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This little museum in the town where zombies were born celebrates the living dead.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

Handsomely crafted representations of our round planet.

A haunted hill that supposedly defied gravity.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.