Every inch of this chapel is covered in craftsmanship from across the world.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

Thousands of well-dressed mummies below a monastery.

Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.

The world's most active stratovolcano is almost always erupting.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

A madman's personal garden filled with 1,000 sculpted heads.

142 ceramic steps become a mosaic once a year.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

The world's oldest bookshop still in operation.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

Rippling sand dunes frozen in the Arizona rock.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

The mountaintop wind turbine boasts a viewing deck — and a fair share of controversy.

The remains of a Canadian train crash are now mouldering beneath layers of rust and graffiti.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

The oldest olive tree in Greece has been bearing fruit for at least 2,000 years.