They’re everywhere! Take a look at this panorama. As the kms click by the mounds get bigger, the scenery changes gradually every 100kms or so and it’s great. Like watching a live 360×360 TV.
For the hand glider pilots out there this is a nightmare. The mounds are like concrete, rock hard. Just waiting to grab the base bar and nose you in!
Occasionally someone puts a T-shirt on one and it’s pretty funny. I’m waiting for the best one so I can get a photo.