One of the world's first dedicated bank buildings in the world is now the oldest one.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

Enormous ants wielding giant pine needles guard a Stockholm real estate company's office.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

Sound travels strangely in this underground whispering gallery.

A wooden street sign is the last remnant of this 400-year-old alleyway.

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

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

This memorial was created by an Irish nurse who lived in New York City during 9/11.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

A hugely vast Irish landscape of barren rock that stretches for miles.

A stunning Victorian abbey and walled garden on a lakefront.

Nestled in the woods lies this land art project: a hybrid between park, maze and natural monument.

An oddly conical beacon perched atop beautiful Irish cliffs.

Found in the waddenzee, this propeller has been put on public display as a reminder of the Second World War.

This Dutch windmill has its roots in an American invention.

This steel frame is a skeletal mirage of a lost 16th-century stone building.

A bizarre form of natural mummification was discovered in the church of this Frisian village.

Home to the world's oldest functioning orrery.

This large open-air museum showcases the ordinary lives of the people of the Netherlands and pre-industrial crafts and practices.

Various sculptures are a rotating exhibit in this small town.

The oldest skyscraper of Europe now stands dwarfed by the surrounding structures.

An awe-inspiring giant blue whale jaw bone stands in the center of this Dutch island.

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.