Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

A tomb with a window to ensure the interred wasn't buried alive.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

The approximate spot where the last Grand Master of the Knights Templar was put to death.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

A dollhouse full of taxidermy rodents, each one handcrafted and given a sordid past.

This ghost town houses the remains of Alabama's old state capital.

This giant geoglyph of mysterious origins is now the site of neo-pagan rituals.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

Frida Kahlo's childhood home, now a museum of her life and works.

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

The final resting place of the poets Shelley and Keats.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

An Industrial Revolution-era public work that purified water using nothing but sand.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

A fairy tale castle in modern Rome.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

A rather vulgar example of the transition from Latin to the Italian vernacular.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

This ghost town was once a cult-like religious utopian settlement.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.