One may visit the Samothrace Diver's Club and participate in series of activities such as:

Scuba diving seminars
Scuba diving in interesting places of the island
Obtain oficial Scub Diving Lisence
You can find more information at the official site of Samothrace Diver's Club

Official Link

Samothrace Climbing Club organizes interesting hiking routes in one of the heighest mountains of Aegian Sea. There you may admire some of the spectacular natural landscapes of the mountaineous area of the island.

Official Link