The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

Northern Ireland's Brobdingnagian stepping stones.

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

The inscribed stone at Kilnasaggart is a remnant from nearly a millennium ago.

The ruins of a medieval monastery named after a type of tree.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

Petrified footprints of one of the very first vertebrates to walk on land.

An ancient holy well said to be used by the patron saint of sailors and travelers, lost in the boggy west of Valentia Island.

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

Huge standing stones mark a site of megalithic mystery.

The largest portal tomb in Europe has a capstone weighing around 150 tons.

Ancient Bronze Age rampart that was used into the middle ages.

This Bronze Age tomb is the centerpiece of a clearing within a beautiful Irish forest.

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

This ancient Irish landscape boasts hundreds of legendary ruins.

A showcase of geologic history is home to one of the largest collection of lunar meteorites on Earth.

This Cape Cod museum exhibits what it claims is the only authenticated pirate treasure in the world.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

Scene of the grisly murder of two Norwegian women in 1873.

After giving up Michelin glamour for his Amish faith, one chef now makes stellar sausages in a small, off-the-grid shop.

A couple's 60-year love of collecting is on display at this unique stove repair shop in Maine.

On Hurricane Island, a former ghost town has been transformed into a forward-thinking research center.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.