Visit us Plan your visit Parking in the Rural Estate Nene Park Trust owns the car park at Splash Lane, Castor which is open at all times for visitors free of charge. The car park is accessed by driving down Splash Lane, from the village of Castor. (Postcode is: PE5 7BD). Please be aware that the access road to the car park is a single bumpy track. As this car park is quite remote, please take extra precautions with security. Any items left in vehicles are left at the owners' own risk. There is additional on-road parking around the Rural Estate for accessing other areas.