A massive Celtic cross secretly growing in an Irish forest.

This rare and ancient Christian relic is one of Ireland’s oldest freestanding stone crosses.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

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

This single room has survived the centuries with almost no deterioration.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

This nomadic monster has divided opinions as it prowls across Canada.

A beautiful waterfall and beach where precious stones are plentiful.

A complicated, forgotten beacon of hope for thousands of immigrants, "Canada's Emerald Isle" lies in ruin.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

This natural sea cave hides a small wonderland of natural turquoise beauty.

A long-abandoned provincial prison left to crumble in the frigid air of Ontario.

Inside this park, an engineering marvel from the early 20th-century still stands.

This shack nestled in a 120-acre forest of maple trees in Mont-Rigaud is a wonderland of sugary syrup.

Canada's oldest railway tunnel is illuminated in a rainbow of color as it passes under the streets of this small city.

Thanks to its curved shape, this incredibly durable dam "whispers" to visitors.

This sculpture was made in 1973 for the city's 300th-anniversary celebrations and was largely considered an eyesore at the time.

A mysterious lake provides fresh water without any source, somehow restoring itself from atop its mountaintop perch.

This giant Canadian coin is a monument to the artist who created its iconic emblem.

Take a ride on antique streetcars from across Canada.

Legend says that this short Canadian tunnel still holds the dying screams of a girl who burned alive.

Abandoned for over a century, this chilling train tunnel is now a destination for ghost hunters.