London's amazing modernist public square that never was.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

A statue of the original Pearly King is hidden in a church's crypt.

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

The plunge pool is a surviving relic of a rowdy royal residence.

A relic of Victorian grandeur hides beneath a busy South London road.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

Hackney's newest private museum and natural curiosity shop.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

An archive of ceramic eggs painted to record clowns' personal makeup designs.

This secret garden has bloomed into London's most unique hub of urban creativity.

The world's oldest family-run magic shop is hidden beneath a bustling London thoroughfare.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

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

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

This museum inside a museum tells the story of London's timepieces.

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

Black cat statues guard this temple-like Egyptian revival factory.

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

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

A memorial to a dog that inspired rioting in the streets of London.

A museum wholly devoted to juvenescence.

The remains of the great moral philosopher reside in a university in London.