Half of a waterfall goes into the river while the other half seems to disappear.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

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

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

More than five miles of underground passageways.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

The only diamond mine in the world where you can keep what you find.

San Francisco Bay's ghost town.

One of the ghostly stops along Route 66.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

A piece of outsider public art accompanied by a strange urban legend.

One of the oldest living oak trees in the Southeast.

This ultra-modern home clings to the slope of the Hollywood Hills on a precarious stilt.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

Abandoned power station once home to a squatter community, now being developed into an arts center.

The site of murders and Satanic cult gatherings.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

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.