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

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

This giant roadside fruit is home to an array of apple-based treats.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

This grubby wall is said to be one of the Earth's esoteric energy centers.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

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

Canada's subterranean Cold War museum has doubled as a movie set.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

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

This colorful creation wasn't always a welcome part of Toronto's Moccasin Trail Park.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

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

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.