The world's second-largest sundial, made entirely out of stone.

Sacred Indian temple that’s all monkey business.

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

This private residence was the template for one of the most beloved television homes of all time.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A winding path built in secret on the edge of the continent.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

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

Site of a former hidden treehouse in New Orleans.

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

An impressive collection of dollhouses and an homage to the frog-leg canning industry.

Tiny historical streetcars wind through a small scale version of Crescent City in this whimsical train garden.

The only rotating bar in New Orleans has been slowly spinning since 1949.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

The final resting place of New Orleans' most famous voodoo priestess.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

There's an old indoor swimming pool hidden directly underneath the White House Press Briefing Room.

A celebrity from the late Cretaceous period.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

Journey through a collection of over 35,000 Halloween items from all generations.

The world's largest "Christmas tree" is illuminated by hundreds of lights stretching 2,000 feet up the slope of Mount Ingino.

The towering Pinocchio stands 63 feet tall in the Italian village his creator frequented as a child.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.