Please note the geocache is located on Hornsey lane, not archway road. It is a 30mm film canister. The cache is available 24-7 but I would recommend it during the day.
The cache is located just off Archway Bridge, a historic landmark in Archway (north London) The bridge is a single-arched structure that spans Archway Road. The original bridge was brick and built in 1813 but was then replaced by the current cast iron bridge in 1900. From the bridge, you should be able to see a great view of Londons skyline including St Pauls and the Shard.
