A lush indoor jungle fills this bustling Madrid transportation hub.

A bizarre stone beast lurks on the beach of a popular tourist island.

The United Kingdom's smallest working cathedral also serves as a quaint bed and breakfast.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

These semi-natural waterfalls hint at the park's Victorian-era industrial past.

Largest lake in Great Britain measured by surface area.

“It has nae lugs!”

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

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

The tennis legend used this racket while breaking the race barrier and becoming the first Black man to win the US Open.

This stone tower in a small town's graveyard looks as though it would be more at home in a fairy tale.

Have a seat with the father of modern computing at this Manchester monument.

Narrowest house in Boston.

"Try not to knock anything over!"

The stately remains of Llywelyn the Great's mighty fortress.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

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.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.