The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.

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

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

Religious dwelling in a Spanish volcano.

The tallest stationary dunes on Earth also happen to sing.

A geological oddity topped with a 2,000-year-old pagan temple.

A spectacular cave and a beguiling lake.

A natural arch offers panoramic views of Yangshuo's karst hills.

Village situated on a narrow volcanic escarpment.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

Rippling sand dunes frozen in the Arizona rock.

This little slice of the Netherlands in the Pacific Northwest blooms in a rainbow of color each spring.

Every spring, this walkway outside the Japan Mint turns into a cherry blossom tunnel.

Propped high atop the peak of Mount Gamsutlmeer, this abandoned village is one of the oldest settlements in the region.

These courts are the only ones of their kind in the world, made for a unique ball game that dates back to the 1700s.

Contrary to its heavenly name, this tranquil oasis has a dark and tragic history buried with it (quite literally).