This Gothic Revival castle used as a shooting location for "The Secret Garden" and other films.

This hidden green space is the city's second largest conservatory.

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

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Giant, friendly pelicans in Central London, the most unlikely of places.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Eighty million natural history specimens call this gargantuan museum home.

Hear the quietest sound from across the dome.

One part local history, 99 parts gruesome haunted house.

Famously misunderstood wonder of the ancient world

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

Elaborate tile work in this railway station tells the story of Portugal.

A charmingly eccentric magma chaser presents his complete history of the island's eruptions since 1947, in cinematic form, just for you.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This beautiful, historic church looks like something out of a simpler past.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

A sulfuric martian landscape that looks far better than it smells.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.