England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.

A historic, reportedly haunted pub that provided inspiration for several famous adventure novels.

Banksy's image of a naked man dangling from the window of a sex health clinic.

A rococo room covered entirely in porcelain originally constructed for another royal residence.

A wunderkammer of curious objects and intriguing art nestled within a hub of ancient Roman sites.

Ride a boat through this magnificent underground world, which now doubles as a theater.

An eerie, little-known Neapolitan museum filled with preserved human remains.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.

Eighteen mummies have stood guard behind the altar of this tiny church since 1833.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

A modern sliver of architecture in Roma.

This museum is rotten with a century of wax medical deformities.

A sunken idol welcomes parishioners to Davy Jones' Locker.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

This 16th-century monastery has been turned into a surrealist architecture compound.

The largest and most famous wax anatomical collection anywhere in the world.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

The glowing blue Nymphaeum of Emperor Tiberius.

Geothermal waterfalls in Tuscany.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

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