Two nations form a rare four-sided border at the peak of a mountain, philosophical questions result.

Inside the corridors of this flea market, visitors are sure to find some obscure and odd treasures.

Legends surround an ancient tree trunk riddled with nails for good luck.

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

The resting place for anonymous victims of the Danube's dark waters.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

A spherical "micro-nation" in the heart of Vienna.

An IT-specialist-turned-farmer reintroduces an Austrian food tradition while promoting snails as a sustainable "future food" option.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

This Swiss cemetery is reserved for people who died in climbing accidents.

The most impressive of Basel's three remaining city gates.

A journey through every aspect of the human body.

Switzerland's oldest public observatory is an important part of the Zurich cityscape.

This massive boulder was hurled into a Zurich church when a gunpowder depot was struck by lightning in 1652.

Unconventional site where the tracks of Zurich tramcars intersect.

This work of engineering is imbued with elegance and ingeniousness.

Hidden in the garden of physicist Erwin Schrödinger's house is a life-size figure of a cat from his famous thought experiment.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

One of the world's largest collections of pharmaceutical artifacts.

This charming fountain honors Felix Salten, the creator of the iconic storybook deer.

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

The bears of Bern have been a city highlight for over 500 years.

The Swiss artist's bulbous and overgrown shape-shifting sculpture controversially graces the center of Bern.