A former airfield, now one of the two sites of the RAF Museum. It’s near the railway, and many years ago when passing by, one could see some large parked aircraft from the train. Nowadays the collections are housed indoors, including some purpose-built buildings. Admission is free, though I recollect that they expect visitors to “check in”. It’s accessible by public transport. Access by car is easy, but note that there is now a charge for car parking. This is a large and diverse museum – they say it is impossible to see everything in one day. For more information check the museum’s website. An essential visit for those interested in military aviation.