The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Four giant movable street lights decorate this modern Rotterdam square.

Amsterdam's former hotspot for public executions and dissections.

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

The world’s first museum dedicated to exploring human rights unleashed a wave of controversy.

Hoodoos, naturally eroded land formations, stand 20 feet tall in the Canadian badlands.

Possibly the world’s easiest Easter-egg hunt.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

Traditional 15th century Chinese garden in the middle of Vancouver.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

This piece of Australian modern art is part joke and part history.

Occult books, tarot, oddities.

A whimsical menagerie of creatures carved into a 300-year-old tree trunk.

A clear example of the process of erosion in action.

A plaque at the lighthouse where Frederick Valentich made his last radio contact before he vanished without a trace.

Tiny artwork tucked within glass letterboxes form this hidden gem of an art gallery.

Every hour a secret compartment drops from this giant pocket watch, revealing a lovely surprise.

A beautiful 1920s tower filled with local hidden gems.

This historic tall ship traveled 1.5 million miles around the globe, and once did duty as the mythical pirate ship in Peter Pan.