Water tour of the Tri-City. Yacht cruise with guide: Old Town, Wis-ouj-cie Fortress, Westerplatte, Sopot Marina and Modernizm in Gdynia. See the Tri-City’s most interesting places from a different angle. Do you want to taste the city and get to know a different side of the Tri-City- Check out our Tri-City cruise and spend a perfectly relaxing day in great company.