The Tudor-style cottage in the middle of the square is not quite what it seems.

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

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

An exquisite Baroque church in Vienna's old town.

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

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.

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

The topiary maze at the Habsburg hunting lodge.

Sofia's legislative center is continuously reinventing itself.

A striking symbol of the Bulgarian capital.

The Swiss hilltop housed an early 20th-century vegetarian nudist colony.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A whimsical bridge adorned with decorative dragons.

The oldest housing complex in Riga is a mini timeline of architectural trends.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

Russia's own leaning tower was built on a tragic historical fable.

A former military outpost of Ivan the Terrible, the 16th-century church contains some of the rarest examples of Eastern Orthodox mural paintings.

Replica of mosque destroyed by Russia in the 16th century.

The tallest hotel in Europe.

This Russian religious complex is a Frankenstein's chapel that includes influence from almost all the major faiths.

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

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.