This at times nail-biting 14km bus ride is included in the admission price of the park, taking you through some of the most spectacular volcanic country you are ever likely to see. Buses leave every 20 to 30 minutes and the trip takes about 30 minutes. By about 10am there can be long queues to get into the park, so be prepared to wait for a tour.

The trilingual taped commentary on board has a fascinating eyewitness account by local priest Don Agustín Cabrera.