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

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

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

A set of outdoor stairs named in honor of a famous Austrian artist.

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

Dine amidst exotic plants at this former royal greenhouse.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

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

The beautiful baroque library of the Hapsburg empire.

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

The world’s oldest military museum has remained largely unchanged since the last days of the Austro-Hungarian Empire.

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

A monument dedicated to a lone, brave invader.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

Designed as a reminder of one of the darkest moments in Austrian history.

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

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

The unique design of this former quarry provides ideal acoustics for concerts.

A double cantilever system bridge that was designed to prevent flood damage.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

Take a seat and hear a song by the composer Frédéric Chopin.

Rubbing the buttons along this statue's coat is considered good luck.

This park built on a former fortress has a reputation for romance.