Just a few miles from Novalja, a strange geological oddity has left scientists baffled.

An abandoned saucer-shaped monument in the Bulgarian mountains.

The rusting remains of the largest assembled WWII fleet on the West Coast.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

The Avenue of Mausolea is a series of grand palatial tombs.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Swirling layers of white and red rock earned these mountains their festive nickname.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Huge otherworldly domed rocks on the shore of a deadly lake.

One of the last free public hot springs is decorated with hippie art.

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

This sun-scorched lakebed contains samples of half the natural elements known to humankind.

"Only the devil could play golf here."

The unbelievably opulent home built for an infamous newspaperman.

An abandoned boat that's been stranded mysteriously for decades.

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Quite simply the largest tree in the world (by volume).