Mariners once used this prehistoric landfill as a navigational landmark.

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

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

An Industrial Revolution-era public work that purified water using nothing but sand.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

Walk over a 150 year old manhole.

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

Nature's biggest mammal swims in landlocked Oklahoma.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

This museum explores the history of stickers and is home to RePEELed, an exhibit featuring sticker art from around the world.

An emerald-green grotto just a short trip from Austin.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

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

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Its buzzing collection honors vibrator history.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A fitting attraction for the corn capital of the world.

For those going through a life transition, a place to leave behind a piece of your former self.

A retired firefighter created this contraption so he and his family wouldn't die if accidentally buried alive.

Like a kitschy mirage in the Mojave, this eatery serves up classic 50s-style diner meals and a dinosaur sculpture garden.

The humble horn finally finds a place in the sun.

Enjoy classic musicals with a home-cooked meal at this former staple of American social life.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.