The topiary maze at the Habsburg hunting lodge.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

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

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

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

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

The world’s narrowest house makes for an awkward, four-foot-wide living space.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

This abandoned bunker looks out over the Atlantic from its clifftop perch.

This unique religious structure is an architectural gem with arresting ocean views.

An island made out of shells, including a cemetery.

This deceptively salty lake looks like blushing pink lemonade.

Reputedly haunted sandstone necropolis with exquisite stone carvings.

The restored ferry is now a dockside museum and a unique bed and breakfast.

Thousand-year-old trees tower within one of the world's only inland temperate rainforests.