The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

This grave resides at the crossroad of three parishes.

The largest greenhouse in the world is home to over one million types of plants.

Britain's tallest megalith towers over the cemetery of a quiet English village.

This industrial museum is based on one of the oldest standing iron forges in the U.K.

This old Victorian bathhouse is fed by an ancient spring.

Astonishing rock formations dot the Brimham Moor landscape.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

A modern temple with an ancient philosophy.

These azure waters were thought to lead to the Mayan Underworld.

An Aztec snake god has taken the material form of an apartment complex.

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

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Dramatic river bend surrounds a natural red-rocked pedestal.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

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

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

Rippling sand dunes frozen in the Arizona rock.

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

Traditional 15th century Chinese garden in the middle of Vancouver.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Sleep snuggled in a sphere suspended atop the forest canopy of Vancouver Island.