This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Europe's largest dinosaur museum was founded by a passionate autodidact.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

This isolated island is often capped by its own fluffy cloud.

This everlasting lightning storm may be the world's largest generator of ozone.

A 200-year-old tavern challenges guests to finish a glass of wine while hanging from a ceiling beam.

An unusual vending machine designed to support mourners during funeral ceremonies at Zurich's largest cemetery.

This small museum displays a collection of outsider art and scale models of past "treatments" for mental illness.

Museum of science fiction, utopias, and extraordinary journeys of the mind.

150-year-old satirical tableaus made from stuffed frogs.

A Swiss board game museum housed inside a picture-perfect castle.

Walk through a restaurant's refrigerator door to reach this hidden bar.

A historic observatory precariously perched at the "Top of Europe."

The steepest classic funicular in the world glides along a dizzying incline.

Caves famous for the dragon-slaying saint who lived there.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

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

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

An ornate private entrance to the Vienna subway built specifically for the emperor.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.