These moss-covered medieval ruins tower atop the smallest of Ireland's Aran Islands.

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.

A pair of connected skyscrapers form this symbolic gateway.

An enormous roadside pan tells the story of a battle for pie glory.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

This interactive sculpture allows visitors to leave a message in case a friend passes by.

An inconspicuous footbridge beloved by San Diego locals.

Former self-sufficient mental institution now a planned community.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

A man throwing a giant severed hand towers over Antwerp’s main square.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The modern birthplace of Irish freedom.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

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

The house where the writer spent his formative years.