The abandoned funicular tunnel was a secret base for the BBC during World War II.

The longest stone bridge in England has an impressive history that dates back over 700 years.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Scattered throughout London are ancient remnants of the city's former bounding wall.

One part local history, 99 parts gruesome haunted house.

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

A living memorial to the trees London lost during the Great Storm of 1987.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

One of these two land speed record-breaking vehicles went so fast it shattered the sound barrier.

A rotating bridge that carries a little canal over a larger one.

In Egypt's expanding metro area, many of the neighbors are dead.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

One of the oldest amusement rides in existence was a huge disappointment to its creator.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This 47-story "M" needed 20 years to be completed

This eye-catching roundabout sculpture commemorates one of England's best World War II-era "shadow factories."

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

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

A great example of the inventive canal bridges that were deliberately split down the middle.

A preserved block of timber buildings from the city's industrial era in the Middle Ages.

Every hour on the hour a naked heroine and her leering foil appear from this giant cuckoo clock.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.