A beautiful maze marks where three countries meet.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

An enchanting work of outsider art, full of whimsical sculptures and carvings.

You can spot this teeny tiny stained-glass window from the Bonifacius bridge.

A piece of stonework relief commemorates the site where the Devil's rage, and odd apparel, destroyed a house.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

Christ's blood allegedly preserved in a Belgian town.

This colorful and fiery mural depicts the Irish folk story of the beloved hero Cuchulain.

Designed to commemorate the king's coronation.

This 18th-century fort surrounded by a moat was used to store gun powder and ammunition, and now sits in the middle of a large part in Dublin.

Some of the saint's blood and bones are said to reside in Dublin.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

A devastating booze inferno poured through the streets, claiming several victims who drank it.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

This supermarket offers shoppers a window into the past alongside their groceries.

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

The house where the writer spent his formative years.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

The oldest public library in Ireland.

A nun spent 16 years painting the stunning Celtic mural that covers the interior of this WWI memorial.

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

Experience what life was like in Ireland during the Viking and medieval ages.

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