The remains of the great moral philosopher reside in a university in London.

London's largest outsider art museum.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

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

Catacombs turned marketplace.

Banksy gives themself artistic license with this piece of London street art.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A kaleidoscopic warehouse-maze of handmade neon signs.

A fake block of cheese remembers a feat of dairy engineering from the Chicago World's Fair.

The roadway bend where highway painters practice their craft looks like expressionist art.

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

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

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

The nude sculpture on this fountain shocked conservative townsfolk when it was first unveiled, but not as much as the dead body found in it decades later.

A flying saucer has landed for good in the middle of a tiny Canadian town.

It took over 100 years to decode this enigmatic epitaph for two buried brides.

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

This unusual structure may be on its way to becoming a cultural landmark in Toronto.

The Incredible Hulk, Yoda, Mulder and Scully, and many many others watch over the mean streets of Toronto.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.