Ewell House in Surrey was originally built in the late 17th century and demolished in the 1960s. In its grounds four tunnels were excavated, intersecting to form a rough cross shape. It is not certain as to their purpose but most likely they were to allow servants to enter and leave without being seen by the owner.
However this does not explain why there was more than a single tunnel; their use may also relate to storage - including an apparent Ice Well, and/or possibly to access a separate servant accommodatiuon block. Part of the tunnels was adapted for use as an air-raid shelter in World War II.
The tunnels are hand cut through sandstone and generally measure about 1 metre wide and 1.8 metres high. Around 100 metres of tunnel were surveyed in 1962. No access to the tunnels is currently possible.