1The Spottershill
This hill is located at the landing of runway 27, it gives you an overview over the runway, but you can't see the hangars from here because it is surrounded by trees.
2The South Side
On the south side of the main runway, there are multiple spots. As there is a small embankment along this side of the field, it is necessary to stand a couple of meters above ground level. The spot next to the gas station, on the grounds of a local sand moving company is no longer reachable, but you will find various other companies along this road. You could try to access their private grounds and find a tree or storage facility from which you will have great views of the runway and taxi way. The second spot is at the small industrial estate a little further down the road, where there is a crash gate with a view of the flightline on the other side of the base. If you continue on this road there is a small electricity box you can stand on and have a view of the helicopters in the camp and possible visiting aircraft.
3The West Side
On this spot at the west side of the field, you can see the shelters which are not used very often, but visiting aircraft will sometimes use them.
4Landing Runway 13
This runway is no longer in use, but from this point you have a view of the flightline and hangars on the opposite side.
5The Museum
The Militaire Luchtvaart Museum (Military Aviation Museum) is at the south side of Soesterberg town at the local military complex. It has some nice planes on display, including a DC-3 and a F-15. But most important, entrance is free! So you have to go there if you're in the neighbourhood.