First Time in Finland! (Helsinki)

Hi every one,
Its my first time to come to Finland! I'll visit Helsinki during 1st week of August, So I hope to find 1 or 2 activities/events and interact with IN community!
Also I need your advice for visiting natural/historical places and best night clubs in Helsinki!
If any one have time or like to guide me,,Yes Please :)

Thank you in advance for your assistance!

Sincerely,
Mohamed.