Twisted buildings adorn the banks of the Rhine river.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

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

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

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

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

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

It was once nicknamed "the most bombed hotel in Europe."

An Irish cemetery filled with victims of political strife and violent conflict, including the grave of Bobby Sands.

These barriers stand as stark reminders of Northern Ireland's troubled past.

Northern Ireland's Brobdingnagian stepping stones.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

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

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

Elaborate tile work in this railway station tells the story of Portugal.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The best place in the world to buy tinned fish.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

The deepest metro station in the world.