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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

A museum wholly devoted to juvenescence.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

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

This overlooked street light once served as a KGB dead letter box.

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

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

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

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

Artists and musicians now rule over this former rail station.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

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

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

Repository for more than 22 million pickled specimens.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

London's old-school healing garden.

One of the world's largest collections of pathological specimens.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

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