A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Most-visited and most-photographed slot canyon in the American Southwest.

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

Rippling sand dunes frozen in the Arizona rock.

A modernist landscape of water and sci-fi concrete.

One of Australia's largest secondhand bookstores.

Prehistoric park filled with the fossils of dozens of extinct species including Australian megafauna.

The word 'wunderkammer' translates as 'wonder-chamber'. This Wunderkammer is both a museum and a retail store.

One of the best beaches in the entire world.

Australia's largest traditional hedge maze features a Great Gnome Hunt.

A clear example of the process of erosion in action.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

The tallest sea cliffs on the Southern Hemisphere are a climber's worst nightmare.

The only pollutant in the clear blue water is sunscreen.

This extraordinary geological oddity resembles human-made pavement.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

The unique ecosystem atop an Australian mountain is home to some colorful inhabitants.

A small, but award-winning beach known for its literally spotless reputation.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.