The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

Ship-sized kinetic sculptural fantasy.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

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

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

The Tudor-style cottage in the middle of the square is not quite what it seems.

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

Chelsea's soldiers were given strict orders when crossing this historic bridge.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

Amazing collection of folly buildings in Cobham, Surrey.

These quintessentially English stepping stones were built for Victorian tourists.

A seaside town with no sea in sight.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

The largest greenhouse in the world is home to over one million types of plants.

A quiet memorial to those who died saving others in the heart of the City of London.

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

The patch of land below the memorial was gifted by the British to the United States.

The commemorative stone column conceals a secret laboratory.

A sea cave with a waterfall and Viking past

The most northern place on the mainland of Great Britain.