Translation of trist

It seems a little bit like a pot in which you want to be happy and rich and enjoy your luck not caring about others. For example, the population is diminishing (or it was so during the last decade).
The place was amazing and very interesting although tourists ruled here. At noon we continued to see a waterfall called Agua Azul, which means Blue Waters in Spanish. It was a two hour drive.
Swimming in the open water was refreshing and fun and some of us jumped of the roof of the boat into the deep waters. After another snack break the four of us were invited for a Kayak excursion.