Reproductions of nine banned oil paintings coyly hidden behind a curtain in a New Mexico conference room.

Inky sludge oozes to the surface of this beach thanks to a rare natural tar seep.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

A beautiful collection of taxidermy birds and rare pomological wax models.

Gorgeous purple flowers drape from the world's largest blossoming plant.

Hundreds of stones dangle from barren trees in the middle of the desert.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

A boiling wellspring flowing with natural gas burns in a continual blaze.

You would never come across this tiny green oasis if you didn't know it existed.

The remains of the oldest synagogue in Britain lay forgotten for seven centuries, hidden under a humble shop.

This family tattoo parlor has been inking religious pilgrims in the Middle East for 700 years.

A quirky collection flush with information on commode culture from ancient times to modern day.

A prized globe signed by Amelia Earhart and Charles Lindbergh sits in the Brooklyn office of the American Geographical Society.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

The state's only comprehensive museum dedicated to the mineral that defined its history and economy.

On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins.

Visit these gentle, bell-bottomed, exquisite equines at the home of North America's first Gypsy Vanner horses.

The 40-year-old machine serves soda quicker than you can catch it for a mere 75 cents a pop.

A city block packed with whimsical sculptures that seem to be plucked from a tiled fantasy world.

The steepest classic funicular in the world glides along a dizzying incline.