The burial place of 14 of the executed leaders of the Easter Rising.

A gated cross stands on the site where an Irish revolutionary met his end.

This strange statue features a bust of the famous composer plopped atop a woman's body.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

A historic observatory precariously perched at the "Top of Europe."

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

Northern Ireland's Brobdingnagian stepping stones.

These murals stand as reminders to the troubled history of this Northern Ireland city.

A 600-year-old mini shrine guarded by a sword-wielding knight hides in a crumbling cliff face.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

A miniature village mimics the surrounding buildings so well it includes itself.

A petite castle folly in the English countryside.

Grab a cuppa at England's first and only domestic tea plantation.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

An intricately decorated tiny place of worship.

Underground hospital complex constructed by slave laborers during the German occupation of the Channel Islands.

One of the world's smallest prisons boasts just two small cells.

The first island in the world designated a light-pollution-free astronomical observation point.

A passage grave used in neolithic rituals.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.