The Barbican Conservatory, part of the Barbican Centre and near the Museum of London, is the largest conservatory in the capital outside of Kew Gardens and this view of a high level walkway gives some idea of the scale of the structure. Note the top of a tree on the left.

There are many exotic plants on display including trees and cacti and entrance is free at the time of writing (2012).

The Barbican Arts Centre and terrace. The Barbican Estate is a maze of walkways on different levels although there are boards with maps scattered around including the all important 'you are here' legend.

St Giles without Cripplegate is one of the few remaining medieval churches in the City of London. The word 'Cripplegate' has nothing to do with cripples but comes from the Anglo-Saxon "cruplegate" which means a covered way or tunnel which ran from the town gate of Cripplegate to the Barbican, a fortified watchtower on the City wall.

Part of the old Roman wall, shown here, which surrounded Londinium can be seen within the Barbican estate. This wall would have been built in the 2nd or 3rd century and was one of the largest construction projects carried out in Roman Britain. The wall was constructed largely from Kentish ragstone brought by water from Maidstone.

The semi-circular base protruding into the water is the base of a 13th century Bastion and a more complete tower can be seen beyond it in the distance.

Ironmongers Hall next to the Barbican High Walks and near the Museum of London. The Ironmongers Company, one of the Great Twelve Livery Companies dates back to the 14th century.