A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

The final resting place of soldiers' loyal canine companions.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A rare wooden coffin set vertically into the Gothic arch of an ruined church.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

The Great Fire of London and the regulation of one-way streets both started in this alley.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

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

London's marvelous wildfowl reserve along the Thames.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

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

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

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

The remains of a Dominican friary, once one of the largest of its kind in the United Kingdom.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

It should come as no surprise that the world's largest artichoke lies in the town that calls itself the "Artichoke Center of the World."

Macabre astrological automaton clock dating to the late 1400s.

This spooky statue sits outside a famous Prague theater.

A hands-on traveling collection of the innovative devices of yesteryear.

Read a book next to a Midtown waterfall.

In the depths of Glasgow Cathedral's crypt, one pillar stands out from all others.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.