The last Victorian market in Belfast.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

This massive monument has been telling the time for 150 years—at a slight angle.

Belfast's namesake river still winds below the city center, hidden from sight.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

A series of stained glass artworks that depict images of the hit TV show.

A museum marks and documents the site of the Titanic's launch.

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

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

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

The modern birthplace of Irish freedom.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Maybe the only restaurant in the world where your seat will be signed by a Nobel laureate.

Stockholm's narrowest alley is barely over two feet wide.

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

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

The memorial stands at the intersection of the rivers Morava and Danube.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

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

A World War II evacuation tunnel turned into a history display of Croatian state and people.

One of the largest busts in the world celebrates the German city's erstwhile namesake.