It is encouraging customers to look out for the range of architectural detail at many of the line’s historic stations. The treasure hunt, which starts at Shepherd’s Bush station and will run from 10.30am-3.30pm, is free and open for all to attend on a drop-in basis. The Central Line opened in 1900 as a cross-London route from Shepherd’s Bush to Bank, and this event is an opportunity to discover more about its history and heritage, as well as its hidden stories. Visitors will pick up a clue pack at Shepherd's Bush, then follow it through several stations before finishing at Bank. Other stations on newer parts of the Central Line also reflect the evolution of architecture - and customers are encouraged to look out for the varied styles of the buildings.