San Diego Seal Tour. Take in the highlights of San Diego Bay during a 90-minute sightseeing tour by amphibious vehicle. Travel on both land and water like a ‘duck tour,’ starting on the streets of Seaport Village and rolling down Harbor Drive alongside San Diego Bay. Transition into the water near Shelter Island to cruise past the Cabrillo National Monument, Naval Air Station North Island, Point Loma Submarine Base and the Scripps Institution of Oceanography, experiencing the best of maritime San Diego on this fun and informative tour. Get Special Offer ! San Diego Seal Tour From $39.00