Museum devoted to the artificial language of Esperanto.

Handsomely crafted representations of our round planet.

The beautiful baroque library of the Hapsburg empire.

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

The final resting place for the remains of 143 Habsburg royalty.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

An exquisite Baroque church in Vienna's old town.

The solemn exterior conceals an opulent interior of this 17th century church.

A silly medieval mural preserved on the side of a Viennese house.

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

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

A glimpse into the festive and private lives of medieval Europe.

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

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

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

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

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

The largest fountain in Bratislava.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.