Butterfly is a 7,5 m – 2,5 m wind tunnel located near St. Petersburg, on the coast of Gulf of Finland. It is indoor all-season wind tunnel with all facilities and professional instructors team. Tunnel parameters provide opportunity for both RW and FreeFly trainings (HU and HD for 1-3 skydivers). Friendly staff will help you with accommodation and transfers; will provide some advises for sightseeing of the amazing St. Petersburg. +7 (921) 94-004-94 You are welcome!