Lethem

Lethem is a city in Guyana.

Hitching out

South towards Brazil

From the center of Lethem it is quite possible to walk as far as the border, once you have completed the Guyanese border requirements, it's a rather long way over to the Brazilian side, so asking the officials at the office to help you (explain you are looking for a ride) you can get over in somebody's car. Once on the other side you can carry on hitching from just after the Brazilian border post, the road is heading straight first for Bonfim (don't let anyone take you into Bonfim, tell them to drop you on the road to Boa Vista if that is you direction or you will regret the walk back), then for Boa Vista.