A 150-year-old steam locomotive crosses the southern half of the island daily.

World's largest working waterwheel has been around for over 150 years.

A museum dedicated to the former country.

This 135-year-old weather station studied the effects of the climate on human health.

Different sections of the Zemun Fortress were built in the 14th and 15th century as a response to the advance of the Ottoman Empire.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

This ice cream parlor serves scoops of flavors like rakia, medlar, and poppy seed.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

A line of disused military bunkers built to defend against Nazi invasion lies hidden on the outskirts of the city.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Brass plaques embedded in pavement preserve the memories of those who lost their lives at the hands of Nazis during World War II.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

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

This little medieval church hidden in the center of Yerevan was lost and rediscovered—twice.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

You'll find just about anything in this funky Tbilisi flea market.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

Mummified monks and the accidentally interred, in a 17th-century crypt.

Europe's second largest ossuary wasn't discovered until 2001.

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

The Habsburgs' royal collections of art and wonders.

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

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

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.