Uyuni a small town situated in the middle of nowhere. It has few attractions but is the starting point for trips to the world's largest salt flats, Salar de Uyuni and Bolivias southern Altiplano. Check out Salar de Uyuni for more extensive information on the tour.
You will need several hours (12-15 hours) from Bolivia's capital, La Paz, by train and/or bus. The bus ride can be bitterly cold in winter - travellers have been known to sit in their sleeping bags on the night bus from Oruru to Uyuni in December.
You can also rent a car in La Paz and drive.
Plan to arrive a day or two before you intend to depart on the tour, especially if there are only 2 of you. That gives the chance to meet other travelers, thus a larger group has more bargaining power for the 'daily rate'. However, it is still common practice for tour operators to join tours together so even if there are only 2 of you, you can still end up going with others from another company, but sharing the same vehicle!
It is a good idea to plan to FINISH your tour on Friday as the best option to leave Uyuni (which you will want to do asap as there is NOTHING to do there!) is the Saturday morning bus which goes North. It is the best bus in Bolivia! (Only leaves on a Saturday - however as things can change quickly in Bolivia, check it is still running - it was in late 2006!)
Driving across it is one of the weirdest and most fantastic experiences anywhere on the continent, when the bright blue skies contrast with the blinding-white salt crust. Dawn and dusk on the salt flats are wonderful spectacles, and in the rainy season they turn into a gigantic mirror. It is a photographers paradise.
It is advised that you hook-up with any of the many Uyuni tour companies that operate 4-WD vehicles onto the salt flat. It is possible to drive a rental car you might have, but be aware that soft, muddy spots are plentiful and that if you get stuck, you could well lose your car as there are no emergency services available to help you out. You also will be subject to walking out of the flat to "shore," which, depending upon where you are on the flat, could take days.
There is now a Banco Credito ATM in Uyuni, on Calle Potosí. Prodem gives cash advances on mastercard or Visa creditcards with a 5% commission. There are several casas de cambios to change travellers' checks or dollars, euros, Chilean pesos or Argentinean pesos.
Get the stamps you need at the immigration office at Potosí and Sucre.
There are several slow internet places for around 5 Bs. per hour.
You can get cash out of an ATM indoors at a bank with Maestro
If you plan to go Chile, travel offices arrange transportation from Laguna Verde (what is usually a stop on their trips) a to San Pedro de Atacama. Remember to get an exit stamp in Immigration Office in Uyuni (the date on the stamp is the expected exit day, so you may get Chilean entry stamp with earlier date). Some tour operators: