Foca is a small town in Bosnia & Herzegovina, which is located on the Drina river. The best tourist attraction around this town are the Sand Pyramids. These natural pyramids are probably the most spectacular place in Bosnia. These sand blocks are made of sandy clay produced by the erosion of the soil. Locals call this place the Bosnian Grand Canyon. There are plenty of things to see in Bosnia & Herzegovina, but if you do not go to these pyramids you cannot say that you have been in Bosnia.