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

Apartment complexes built into huge repurposed natural gas tanks.

Fantastic stories on a miniature railroad.

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

The medieval network of canals hidden underneath the city is opened to explorers each year.

A unique opportunity to stay the night in retrofitted sections of sewer pipe.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

An exquisite Baroque church in Vienna's old town.

The shell of a medieval fortress offers commanding views of the area it once protected.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

A silly medieval mural preserved on the side of a Viennese house.

American soldiers discovered Europe's best one-liner at the end of World War II.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

The world's oldest known salt mine.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

The personal charnel house of Anton Bruckner.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

"World machine" built by an untrained Austrian farmer.

Double spiral staircases are not unheard of, but they are very rare.

This cubist Vienna church building looks like some sort of alien stonehenge.

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

Baroque celebration of the end of the Great Plague of Vienna.

Ride a dragon train into a world of dwarves.