An ethereal glowing blue ocean cave in Croatia.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

Famously misunderstood wonder of the ancient world

A hand-built folk art installation covered with messages of God's love.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The ghostly remains of an accidental sea.

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

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

A massive underwater sinkhole made famous by Jacques Cousteau.

Dramatic river bend surrounds a natural red-rocked pedestal.

A swing to dangle you off the very edge.

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

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

On the Oregon coast there is a natural hole that seems to be draining the sea.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

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

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