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

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

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

Ship-sized kinetic sculptural fantasy.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

This 19th-century church is now a popular roller rink.

An enormous artwork that colorfully celebrates over 150 years of US military achievements.

Radioactivity still cause for concern at this urban explorer's paradise.

Join the circus for a few lessons to learn clowning, acrobatics, and Chinese contortion.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Olfactory delights in San Francisco's Botanical Gardens.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

This shop specializes in oddities and Victorian-inspired wonders.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A 140-year-old castle with underground caves hidden in San Francisco.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

At this California chicken ranch, four bucks will get you 18 eggs and a chorus of dancing animatronic poultry.

A large instrument played by the wind.

A unique piece of graffiti offers a little slice of local history and mystery.