Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

This lab's maddening silence is good for business but bad for sanity.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Mysterious rocks that ring musically when struck.

Thousands of well-dressed mummies below a monastery.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

An Australian lake whose pink hue defies scientific explanation.

A walk through the historic city center, under the streets of Seattle.

An abandoned castle owned and ignored by Masons carries a cursed history.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

The seamy, underground secrets of Portland's criminal past.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

Towering basalt columns, a creation of fire and ice.

Hot springs monkey spa in the middle of Hell's Valley.

Stunning wetlands ablaze with pink lotus flowers.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

Dramatic river bend surrounds a natural red-rocked pedestal.

A crumbling hospital from the 1850s on Roosevelt Island.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

Medicinal spa created with the discharge from a geothermal energy plant.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.