A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This medieval Italian village was transformed into an architectural marvel by the famous "Papessa" Donna Olimpia.

A spiritual vortex among the red rocks in Sedona.

An alchemist's “magic door” stands in the middle of a Roman park.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

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

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

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

Stockholm's narrowest alley is barely over two feet wide.

Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.

An ancient artistic garden parlor full of hidden water wonders.

Mosaics, storks, and brothels—this ancient city has it all.

It houses the remains of a 17th-century version of the Titanic.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

A 16th-century horror show built in a lovely Italian garden.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.