These light, hollow rolls have been linked to Acadia National Park since the 1890s.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

A hugely vast Irish landscape of barren rock that stretches for miles.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The house where the writer spent his formative years.

The oldest church in Inverness witnessed the brutal executions of many Scottish soldiers.

Largest lake in Great Britain measured by surface area.

A local tree surgeon has created a whimsical walk full of carved tree stumps near Scotland's Loch Lomond.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

A double cantilever system bridge that was designed to prevent flood damage.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

The longest staircase lock in Britain.

The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

A solemn memorial in a majestic setting that honors a 1692 tragedy.