Как правильно? relax on trafalgar square? или relax at trafalgar square?

Я думаю:Relax on ...

Привет дорогой друг, я получил твоё письмо и благодарю тебя за .Сейчас него.Я нахожусь в деревне и планирую остаться здесь до конца лета.Здесь  очень весело, я нашел много новых друзей. Мы играем в футбол каждый день, купаемся на  речке.  Рыбачим с дедушкой,один раз мы  поймали много рыбы.Я также своей бабушке.Ну вообщем тут очень весело!А как у тебя дела? Что ты делаешь сейчас?
С наилучшими пожеланиями  твой друг
Hi dear friend, I received your letter and I thank you for it.Now I am in the village and plan to stay here until the end of summer.To me it is very fun I found a lot of new friends. We play football every day, go to the river.Once with my grandfather I went fishing, we caught a lot of fish.I also help my grandmother.Well, actually it's very fun!And how are you doing? What are you doing now?  Best wishes to your friend.

Yes, I do think that hobbies are useful for people. Doing something you enjoy helps to relieve stress and keeps you happy.
There are so many hobbies it's hard to list all of them. For example reading, traveling, drawing or photography, writing, dancing. Some people like sports.
All my family is really into reading. Also my mom does yoga twice a week. And my father likes fishing.
Yeah, definitely, I believe it is very much possible to have more than one hobby.
It's hard to say what hobbies are the most interesting. It depends on a person. But I guess the most unusual one are usually the most fascinating.
My hobbies are tennis and reading. I also like listening to music a lot.
Yeah, I have been having some of my hobbies for a long time.
I'd like to take up photography.