This place is beautiful. Come on a sunny day so the pools look more green from the reflection of the sunlight. It can be done in around 4.5 hours (we were up at 12:30pm, and down by 5pm - we took the cable car up and walked all the way down). Make sure you buy both the cable car ticket AND the park entrance fee. They are listed separately on trip.com. Also, buy some oxygen if you are not used to being in high altitudes. I originally thought it was a tourist trap but I saw a lot of people with them and my partner and I did in fact feel some altitude sickness. The only qualm we had about it was how crowded it was. We had lovely weather but the wait for the cable car was 1 hour, and locals have no concept of personal space and WILL budge/push to get what they want (a bit of culture shock for us!). Overall it was still enjoyable though!