According to our records, this business is located at 1200 Highway One in Lewes (in Sussex County), Delaware 19958, the location GPS coordinates are: 38.7462133 (latitude), -75.1558013 (longitude). Grotto Grand Slam is categorized under Drive-In Restaurants (SIC code 5812). Known organization general manager is Ralf Galbrehth. You can contact the company by phone at (302) 645-4900.