Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.

The ruins of this medieval castle on a foggy hill tell the story of a once-mighty empire.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.

The bizarre rocks of Đavolja Varoš are the result of natural erosion.

Legends of treasure and spirits flow from this this fairy tale-like oasis.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

A Jenga-style cylindrical tower of books that appears to go on forever.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

A collection of items from a way of life that no longer exists.

Brightly painted boulders scattered throughout the Sinai Desert.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

The solemn exterior conceals an opulent interior of this 17th century church.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

An exquisite Baroque church in Vienna's old town.

Apartment complexes built into huge repurposed natural gas tanks.