These medieval tunnels provided water to the city above through centuries of civil war and plague.

Northern Ireland's Brobdingnagian stepping stones.

The remains of a paranoid inventor's hidden workshop lie in beautiful ruins amidst a Canadian park.

This oddly named town refuses to change its phallic moniker.

This former iron ore mine comes alive with fascinating stories of its history.

An old drug store full of mortars and pestles, pill-making machines, and medicines reputed to cure most any illness.

Where a young athlete began his run across Canada after losing his right leg to cancer.

The first transatlantic wireless signal was received at this 17th-century fort.

A World War II gun battery sits at the easternmost point of North America.

A boardwalk winds above this beautiful bog full of wildlife and a rare type of turtle.

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

Famously misunderstood wonder of the ancient world

Medicinal spa created with the discharge from a geothermal energy plant.

A fantastic castle rumored to be the birthplace of King Arthur.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

An ancient Viking village in North America that predates Columbus by 500 years.

A forlorn fishing village on the coast of Labrador, full of shipwrecks and Spanish gold.

This rocky spread has been squeezed up directly from the bowels of the earth.

This huge ship ran aground and has simply been left to sit there ever since.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

Two thirds of this Montreal neon icon has survived to flash another day.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A massive Montreal stadium that has seen nothing but trouble since its inception.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.