The Uyuni Salt Flats or the Salar de Uyuni as they are known locally are accessible from La Paz, Boliva as well as from the Atacama Desert in Chile.
At an altitude of 3,656 metres, the salt flats are often used to help satellites gage the accuracy of their instrumentation due to its immense size at just over 12,ooo sq km and for being so flat.
When taking photographs and videos involving depth perception, it is often best done with a cell phone due to the fact that you can get the lense much closer to the surface of the salt pan, while still being able to view your subject on the screen. If using a DSLR it is difficult to see through the view finder at the correct angle.
March is the end of the rains which gets you a lot more water on the salt flats making sunrise and sunset perfect for a photographic experience of a life time. We were situated an easy four hour drive north from Uyuni, a drive filled with various geographical phenonium. Given our position and distance from Uyuni we experienced no other tourists and in fact apart from a few salt trucks we barely saw anyone.
Aside from the salt flat and all its splendour there is actually a whole host of interesting and exciting activities to be done in this area, just remember to take it easy and go slow as the effects of the altitude can be dangerous. Having said this the sheer splendour of this area will always outweigh the risks in my mind and as such I urge you to visit.