As well as the many underground stations and passages beneath Waterloo Station, there are also many hidden spaces beneath the mainline station. Like many urban termini, the approach to Waterloo (opened in 1848) was carried on viaducts to minimise the disruption to existing roads and thoroughfares.
At various times these spaces have been used for storage, offices, a telephone exchange, air-raid shelters and staff recreation. Today part of the space houses an art gallery and theatre space. Areas can also be hired for (expensive) private functions.