Bugging out??

[NorthernRaider]

GPO telephone exchanges built from late 50s through lates 60s and some in 70s, usually the give away is external steps down to a steel cellar door, lots of spring loaded lourve vents, big oil tanks set under road or street level. These were built with locker rooms and bunk beds for Post Office Technicians to man and maintains the exchanges during a nuclear war. all the supplies have long since got but most of the secure rooms are still their along with sink, water, bogs etc.

Many 1960s modern town centers had multi story car psrks built, over with an undrground or sub street level, these frequently for some weird reason were fitted with big steel doors that could close off both vehicle and pedestrian access, some still have "" Maintenence "" rooms behind steel doors out of sight and mind.

Some modern shopping centers were build with underground delivery bays for trucks to get right under the shops they served (Stockon on Tees is a good example) also with heavy duty doors, staff rooms, toilets, emergency lighting etc.