From Quito, there are a few buses that reach Quiroga, which is the closest city to the Cuicocha Cracter. From there, take a taxi to the crater for approximately $5 USD. For the trip back home, there should be several taxis waiting by the lake.
Les Grietas
Le meilleur moyen de se rendre à Las Grietas est de prendre un bateau-taxi depuis le port principal de Santa Cruz.