Translation of stronghold in Spanish

Mr. Kohler, Ms. Johansen, in June I will be in Darmstadt for several days and would like to meet you both. Are you in the week of June 16 to June 20 in Germany? I think I also bring gifts.
I have began to learn English. I like to swim and to dive, because I lived near the beach while I lived in Miami. It is not similar to any other sport. But this week have not been yet to the pool.
Many thanks for the nice emails. I visit this site on the Internet all the time, but I have not visited your blogs. Your country is certainly an interesting country and it has mountains and snow.