Northern Ireland's Brobdingnagian stepping stones.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

Protecting the dead from opportunistic body snatchers.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

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

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

The most loyal of little dogs, or a Victorian era publicity stunt?

A 18th century graveyard and its astonishing cortege of macabre iconography.

The final resting place of soldiers' loyal canine companions.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The celebrated eyesore created by starry-eyed sweethearts.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

This bridge was constructed from the rubble of the infamous Bastille.

A surrealist timepiece by the artist of melting clocks.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.