For me, it’s the closest place to home that feels like proper mountain biking.
The following are all good fun:
The Belmont Descent
Slabs down from the pike
The steps down from the pike
The broken road
The Japanese gardens (loads of different lines to play on in here)
The descent down to the dog kennels
It’s no match for a good route in The Lakes, The Peaks, etc, but for a midweek ride or for days when you don’t fancy the hassle of spending hours in the car it’s well worth a trip. Good post ride coffee and cake in the cafe by the bottom barn too.