In principle, one can seatrekken in many places. In Thailand or the Caribbean as well as in the fjords of Norway or in the Mediterranean. As one moves as Seatrekker in unprotected natural areas, it is particularly important to us, to be formed by a corresponding training guides, people with the necessary know-how imparted.
Basically cliffs are mostly species-rich and diving more exciting than flat sandy seabeds. As an emergency exit and lodging beaches, bays or accessible shore sections must be present. On most are usually the designated marine protected areas. One should of course make sure to first find out whether it is snorkelers and freedivers allowed to enter this well. If one is particularly interested in colder regions, it is important the right equipment (wetsuit of at least 7mm or more, neoprene gloves, etc.) need to.