Italian cave with exceptional acoustics and an unsavory history.

One of the largest underground systems runs under Canada's largest urban center.

The oldest landmark of Toronto is a testament to shifting sands.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The first American department store, and home to the largest operating musical instrument in the world.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

How this Pine Barrens hill got its name is uncertain, but on a good day the view from the fire tower is crystal clear.

Rising out of a clearing in New Jersey's Pine Barrens is an Aztec-inspired monument to the "Lindbergh of Mexico."

Within the church are the relics of the martyrs St. Jean de Brébeuf, St. Gabriel Lalemant, and St. Charles Garnier.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

Walk in the footsteps of the gods and straddle two tectonic plates.

The first woman to become a member of the parliament of Iceland.

An encyclopedic collection of mammal penises.

This stunning concert hall has become a symbol of Iceland's national recovery.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This black church sits alone among a field of lava rock.

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

A fantastic reconstruction of a 10th-century Viking longhouse.

Rising from the sea like a stone monster.

Iceland: home to volcanoes, waterfalls and, apparently, Santa?

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

Akureyri is home to an oversized can of one of Iceland's favourite beers.