A haunting monument dedicated to the Royal Naval Air Service and the Fleet Air Arm.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The largest of London's subterranean rivers and once a mad, bad center of London life.

The broken skateboards that became a poignant memorial to a murdered skater.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A unique tribute to the millions of animals who served and died for the British military.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

This ancient oak plays host to carvings of magical elves, gnomes, witches, and other creatures prominent in local folklore.

The final resting place to 300 Victorian-era pets hides inside the city park.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

In Houston's airport, a cow is properly equipped to jump over the moon.

The lead horse on a Disneyland merry-go-round that is older than the park itself.

A historic ghost town still worth a visit.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

In a small Japanese garden off a busy Denver street, a memorial to a brave, principled politician.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.