Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

A humble ancient well where Scottish knight, Sir William Wallace, took his final drink.

A mysterious ruin shrouded in more folklore than fact.

The ornate structure is part of a building boasting more marble than the Vatican.

Glasgow’s piece of the patron saint of love.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

Haunting graffiti left by prisoners of the Spanish Inquisition.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

A well-restored ancient archaeology site gives a real feel for life during the Roman age.

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

This pub built its reputation pouring post-shift pints for employees of the cemetery with which it shares a wall.

This 5,300-year-old tomb with mysterious carvings crowns an Irish mountain.

Celebrated in poem, this tiny hidden cemetery has a big and grisly history.

An ancient neolithic tomb that only sees the sun twice a year.

A moody and picturesque riverside ruin overgrown with vegetation.

After the owner of this Art Nouveau home died, it was turned into a museum displaying a lifetime dedicated to art.

Eat the ultimate iteration of Portugal's most beloved pastry.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

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

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 park in Dublin.

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

A brisk climb up this solitary peak leads to the origin story of a towering figure in Irish history.