The frozen bubbles that form on the icy surface of this Canadian lake contain enough methane to create a small explosion.

Blackfoot petroglyphs of southern Alberta which date back as far as 7000 B.C.

The world's largest dark sky preserve is a Canadian park established to preserve the country's last wood bison.

Hoodoos, naturally eroded land formations, stand 20 feet tall in the Canadian badlands.

Few other hotels can rival the grandeur of the Castle in the Rockies.

A winding stairway to a secluded beach in a residential neighborhood.

A colorful hidden village of the fair folk.

Miraculous tree that seems to sprout out of solid rock.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

The rocks of a certain area of Butte, Montana give off a musical ring when hit.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

A whimsical village of unique treehouses resides in a Washington forest.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Stroll through a wonderland of stupendous moss-covered trees.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

A subterranean shelter remains intact under a busy Paris railway station.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

Statue of death tucked in the University of Medicine courtyard.