Translation of beware in Spanish

The first day in a new place is always a little strange. One has to get used to the new environment. I believe that the more someone tries to adapt the faster he gets used to new spots and new people.
I'm so happy that you wrote to me and I miss you! We are doing great. We have settled in very fast. Luise is going to her kindergarden, Sofia to University and I'm going to work driving my car every day.
On the way back I visited a private beach resort. I just wanted to see whether I could get in and it was not a problem at all. The resort belonged to some club on the main land near Cancun.