It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

One of the best collections of wax anatomical models in the world.

This museum is dedicated to the little known ancient Roman history of Vienna.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

The site of Austria's biggest concentration camp now honors its victims.

The first modernist church in Europe.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

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

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

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

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.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

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

An Austrian house of bones filled with hundreds of intricately painted skulls.

Artfully arranged bones of 5,800 Austrians.

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

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

Each year melting snow turns these Austrian hiking trails into scuba zones.

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

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