Car parks,  WC +disabled, visitor centre, children's play area, refreshments.  There are several car parks, and lots of buses and overground trains stop by entrance points.

"Dogs are welcome in all the Royal Parks although there are some places where they are not allowed or should be kept on a lead. These are clearly indicated within each park and are usually ecologically sensitive sites, children's play areas, restaurants, cafes and some sports areas.  
When walking your dog in the Royal Parks please respect the wildlife as well as the other park users by keeping your dog under control. Ground nesting birds are particularly sensitive to disturbance by dogs and people. Please observe the warning signs displayed during the nesting season. In Bushy Park and Richmond Park you should keep your dogs away from the deer.  
The Parks are for everyone to enjoy. Please make sure you don't spoil someone else's day and pick up after your dog. Dog bins are provided throughout the Parks - do make use of them. Dog fouling alters the nutrient levels of soils and can affect the survival of rare flora and fauna."