Bob Haro also invented the style of Flatland BMX. These unicycles are used similarly to flatland bicycles. The flatland between these hills is sparsely forested with Joshua trees. Freecoaster hubs are popular among street and flatland riders. Dyno Pro Compe - one of the most ridden flatland frames of the early Nineties. Phitsanulok lies primarily on flatland with some hills. Regions can be distinct habitats like mountain vs. flatland. There are two types of contests; flatland and wave riding contests. Oakland's fertile flatland soils helped it become a prolific agricultural region. The AFA began to put on organized flatland and quarter-pipe competitions. Returning to himself, A Square escapes Flatland prison and outruns the guards. In "Flatland" Abbott describes a society rigidly divided into classes. He was replaced in 1865 by a former boy, Edwin Abbott Abbott, author of "Flatland". He then goes on to detail theories concerning the 2-D world, named "Flatland". In the south, the country has a small flatland, the Bugeac Plain.