Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

The metal leaves on this tree are engraved with the names of Holocaust victims.

The silly symbol for an underground protest group is now scattered around the city.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

Relive a Polish uprising via an enormous, century-old cyclorama.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

A statue commemorating a Polish dog who took his role as man's best friend very seriously.

This coffee shop lies hidden beneath a historic church.

The modern birthplace of Irish freedom.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Along this wire fence, travelers have been leaving a particular memento since 2012.

A restaurant devoted to "trouser grip" wrestling, an ancient form of Viking wrestling that is Iceland's national sport.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.