This sculpture forces visitors to confront their relationship with space.

Known as "Toronto's Flatiron."

This whimsical fountain pays tribute to Toronto's four-legged friends.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

The seat of Buffalo government is a gorgeous Art Deco palace.

A fantastic place to see murals, and an important location in the history of Toronto's legal street art scene.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

A tribute shrine where the Space Invasion street art movement started.

An ingenious Dutch land art project uses grass ridges to cut airport noise pollution in half.

A massive explosion that leveled hundreds of buildings in the city of Leiden is remembered by a waterside plaque.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

People have been placing babies on these lilies for photoshoots since the Victorian era.

One of the Leiden's oldest pubs is also the birthplace of the Heineken star.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

A quiet memorial to those who died saving others in the heart of the City of London.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Murals of the wild parties once held on the frozen River Thames.

The site of London’s first coffee house has been serving refreshments of one kind or another for 360 years.