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

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

A close look reveals that the Scottish monument is just slightly off-kilter.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

The final resting place of soldiers' loyal canine companions.

A six-ton wedding present for the King of the Scots.

Largest lake in Great Britain measured by surface area.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

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

The second-largest collection of runic calendar staffs in Sweden.

The first thermometer made with the almost-universal temperature scale is backwards.

A small church in Uppsala hides the grave of a renowned 18th-century astronomer.

The official meeting point for the oddly named governing assembly of ancient Sweden.

Uppsala's adorable feline sign celebrates a popular children's book set in the Swedish city.

A botched 18th-century canal silenced one of Sweden's most magnificent waterfalls.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

A nightly tradition fills the streets of Flogsta with a collective scream.

Ancient burial grounds of the wealthy.

Sweden's oldest street has not changed for nearly a millennium.

The second oldest anatomical theater is housed in a museum of curiosities.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.