Avoid gangster interaction while window-shopping.

From Ancient Rome to WWII, Neupfarrplatz has over 2,000 years of history underneath its main square.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

"A hideous albatross in the Hudson River Valley."

Three bridges and one giant canyon make up this fantastic Spanish settlement.

The abandoned hospital whose elaborate ghost stories cover up the dirty truth - an uneventful sanitation issue and other mundane reasons for its demise.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

Detailed sandstone carvings show an array of symbolism and adorable animals.

This historical Netherlands fortress still bears the marks of its single siege.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

The second largest surviving chained library is housed in this 12th century church.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

San Diego's most historic and haunted home.

A museum dedicated to a sea that should have never been.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

The ghost town that ended up on Ebay.

One of the ghostly stops along Route 66.

An homage to the man who built California's version of Venice.

A fine mixture of the old and the new topped with an art deco neon spire.

There's nothing creepier than a cemetery next to a clown motel.

San Francisco Bay's ghost town.

The liveliest ghost town in the state.