Near Dinh Quan on Hwy 20 there are three extinct yet impressive volcanoes. The craters date from the late Jurassic period, about 150 million years ago. You’ll have to do a little walking to see the craters. One is on the left-hand side of the road, about 2km south of Dinh Quan, and another on the right-hand side about 8km beyond Dinh Quan, towards Dalat.