A once-magnificent collegiate church is falling into ruin.

Order a salt beef-loaded beigel at any hour of the day or night at this East End institution.

English antique dealers with a taste for the unusual.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

A hands-off space for graffiti artists to hone and display their skills.

This third-generation institution is one of the last in London that still cures its own salt beef for epic sandwiches.

The real clothing store that inspired a fictional spy organization's front.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

Order “Proletariat’s Cutlet” at this communist-themed restaurant allegedly once visited by Lenin.

A tree planted by Marie Curie is treasured by the Radium institute that she set up.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

A giant interactive periodic table with real samples of the elements.

These beautiful objects represent beautiful ideas.

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

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

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

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

The ritual has been performed uninterrupted for nearly 700 years.

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

This may be the last of London's wooden pavements, which were once a common sight in the city.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

Hear the quietest sound from across the dome.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.