Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

A beautiful geyser under environmental threat.

Stroll through a wonderland of stupendous moss-covered trees.

The sign at the garden gate reads: "These Plants Can Kill."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Medicinal spa created with the discharge from a geothermal energy plant.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

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

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

An exquisite tunnel of cascading flowers.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

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

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

Famously misunderstood wonder of the ancient world