A floating cat sanctuary on an Amsterdam canal.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

A little slice of Japan and its aesthetics in London's Holland Park.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

The anatomical-pathological collection of a man who changed surgery.

The wreckage still sits at the exact spot the plane crash-landed in 1945, carrying 1,000 pounds of explosives.

By public opinion, this is Canada's knottiest tree.

This country market harbors goats on its roof.

This quirky countryside store is known for the goats that hang out and eat the grass on its roof.

A famous hotel houses an impression collection of mini dioramas and giant doll houses.

The narrowest street in Canada was once a spot for dastardly doings, now a historic piece of Chinatown.

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.

A crumbling cliffside ruin hidden in the woods.