This Italian foot path winds through the mountains via 52 individual tunnels.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

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

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Once the home of a hermetic monk, this cave now houses a small church.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This floating sculpture of ice is a poignant reminder of nature's power.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This collection of 80 polarizing foods aims to challenge your subjective notions of repulsion.

This chimerical bridge/tunnel appears to dead end right into the sea.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

This Croatian computer club features such gaming relics as the infamous Virtual Boy and an 8-bit Pacman machine.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Yugoslavia's biggest underground airport lies in ruins.

A forgotten and crumbling Yugoslav monument to the victims of fascism.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

Albert Einstein's head sticks out of a snail shell stacked on a rocket in this truly bizarre monument to the scientist.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."