Ancient human remains unearthed around the iconic monument.

The oldest working mechanical clock in the world.

This high desert botanical garden is a unique display of Northern New Mexico's geology.

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

A unique geological area spiked with wind-carved rocks that resemble teepees.

This centuries-old pueblo church houses the body of a Franciscan friar who is said to be a rare "incorruptible" corpse.

Deadly airliner crash preserved for those willing to climb and pay respects.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

The fictional star of "Breaking Bad" is memorialized with a real-life gravestone in his hometown.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

Thousands of unique minerals, including some of the most impressive fluorite crystals in the world.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

A natural sandstone bridge hidden in the Sewanee forest.

This quirky local sculpture is quite literally a fish out of water.

This replica of the Greek structure is in the heart of Nashville.

In 1912, a broken section of the reservoir wall released millions of gallons of water and destroyed many homes downhill.

For decades these polar bears have roamed all around a Nashville neighborhood.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

These fossilized remains of an ancient saber-toothed cat inspired the mascot of Nashville's NHL team.

Victorian-era Egyptomania left its mark on this Nashville landmark.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

This historic building displays the remains of a victim of the devastating 14th-century plague.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.