The remains of a chapel created for convenience.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.

London's smallest police station is barely the size of a phone booth.

A hands-off space for graffiti artists to hone and display their skills.

Fascinating town where normal life interfaces with the occult.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

This homegrown adoption center offers a wonderland of feline companionship.

A serene space tucked amid the skyscrapers of Hong Kong's bustling financial district.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

This 12-foot-tall T-rex is the largest K’Nex skeleton sculpture in the world.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

Follow the original medieval paths that wind through this intriguing section of the city.

Famously misunderstood wonder of the ancient world

The geoglyph once sported a glass bottle eye.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.