A network of concealed passageways lies within a busy London Underground station.

A movable feast that is an East London institution.

Murals of the wild parties once held on the frozen River Thames.

This museum tucked below a charming cafe gives a brief snapshot of photographic history.

Three small rooms at the back of the “official” church of London's clowns.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

The breadfruit-adorned final resting place of the infamous Captain of the HMS Bounty.

A Victorian school for poverty stricken waifs has been preserved as a museum to their donated education.

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

This home on a quiet suburban street is completely covered with vibrant mosaics.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

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

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

This elaborate Byzantine-style building was designed for a not-so-pretty purpose.

The townhouse where the English poet created some of his most influential work has been preserved in tribute.

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

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

The Florence Nightingale Museum is home to the famous nurse's most treasured possession: her beloved pet owl.

This small collection of rare books was uniquely locked up for safe keeping.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."