The best option to reach Las Conchas Waterfalls is to drive there yourself. The park can be reached by the paved roads from Río Dulce, which are in mint-condition. There is a well-marked sign on the side of the road and as well as a big parking lot.

Cerro Tzankujil Nature Reserve
For a small free, there are shuttles available in Antigua and Guatemala City that offer transporation services towards Cerro Tzankujil