This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

The reconstruction of this prominent building fulfilled a long-written command.

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

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

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

The world's most important buildings shrunk to a tiny size.

This spire on an Austrian mountain is wrapped around a long spiral slide and has the world's tallest wooden observation deck.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

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

The world's oldest known salt mine.

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

The beautiful baroque library of the Hapsburg empire.

The Habsburgs' royal collections of art and wonders.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The topiary maze at the Habsburg hunting lodge.

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

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Macabre astrological automaton clock dating to the late 1400s.