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

The modern birthplace of Irish freedom.

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

Tiny silver and copper fish set inside blue-green lights are like windows to the underwater world.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

A guitar mounted on a wall in Temple Bar honors the Irish musician.

The oldest public library in Ireland.

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

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

This is the place where U2’s lead singer got his nickname.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

This museum is dedicated to the most famous Irish writers in history.

One of the oldest cathedrals in the U.K. houses a priceless early manuscript.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

Two standing stones are all that remains of a prehistoric installation.

It's possible to walk inside one of the largest Neolithic tombs in Britain.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A statue that stood at the center of a long copyright battle.

A collection of trees from various corners of the world call Stockholm University home.

A response to the wrongly placed meridian of the same name.

Celebrating the Swedish ship used in the first Arctic expedition to navigate through the Northeast Passage.

A prehistoric geological oddity tucked behind Stockholm's natural history museum.