The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

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

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

This bridge is haunted by the ghost of a distraught mother.

The only road through the heart of Glacier National Park.

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

A trash dump made beautiful by nature's power.

Volcanically heated hot springs.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

Macabre astrological automaton clock dating to the late 1400s.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

An extravagant monument to an extravagantly unpopular Emperor.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

The most accurate timepiece in the world.

This 47-story "M" needed 20 years to be completed

Vibrant street art created with mixed media.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Cliffside houses provide a spectacular view from their perch above the valley.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.