While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

A collection of expressive stone sculptures in a scenic and serene riverfront location.

A Latvian rescuer who saved countless lives during World War II.

A miniature city, once ruled by the Queen of the Netherlands.

This century-old street sign is a forgotten remnant of the old city.

A relic of the old jail still stands in its original location.

A massive explosion that leveled hundreds of buildings in the city of Leiden is remembered by a waterside plaque.

The remains of a medieval wall discovered in the basement of a jewelry store.

For over 100 years the most important physicists in the world have autographed this university wall.

This public toilet built in the famous Amsterdam School architectural style is a Dutch national monument.

A striking memorial to the Jews of Leiden who were murdered during World War II is scattered throughout the city.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

Visitors to this Belgium graveyard are greeted by the grieving stone parents of the young men lost to war.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

Most prolific publishing house in the 1600s open to the public.