5,000 skulls in memorial to those killed by the Khmer Rouge.

Khmer Rouge's high security prison.

Possibly the world’s easiest Easter-egg hunt.

Profile of a sleeping person four kilometers long in 250-meter-high cliffs.

This giant roadside goose has been hailing travelers into a small Ontario town for over 50 years.

Possibly the world's largest coin stands just outside of a Canadian science center.

The world's largest moose statue is located (where else?) in Canada.

Underground tunnels once home to crime are now back open to the public.

As if T-rex wasn't big enough, this Canadian monument is four times larger than the real thing.

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

Live long and prosper in Vulcan, Alberta.

This Toronto garden collects stares and tchotchkes in equal measure.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Not quite the menace it once was, this monster still has some chops.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Most-visited and most-photographed slot canyon in the American Southwest.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

This giant steer-skull edifice refuses to die.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

America's only nuclear missile silo open to the public.

See massive fossils that are over 200 million years old in northeastern Arizona.

An homage to everyone's favorite prehistoric cartoon family.

A motel dedicated to Southwestern nostalgia.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.