A perfect turquoise lake colored with glacier dust.

Highly spherical boulders on the shores of New Zealand.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

A tunnel of hardened lava along Maui’s famous Road to Hana.

These ancient sacred grounds granted amnesty to those who managed to reach them.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

Where cemeteries are carved into the side of cliffs and infants are buried in the hollows of trees.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

Swiss vineyards in a UNESCO heritage site.

Artworks by loners, prisoners and the criminally insane.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

Largest Kauri tree in New Zealand.

Handcrafted thermal spa washes away each night with the tide.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

Singapore's landscaping project is home to 18 incredible Supertrees.

A Buddhist theme park brings you a Buddhist version of Hell.

The most playful of the life-sized statues that make up Singapore's "People of the River."

Tubing through a cave lit with glowworms is a magical underground experience.

Some of the clearest water anywhere in the world.

This strange geological landscape erupts with sudden bursts of water.

These phallic stone spires once served as Tolkien's Paths of the Dead.