Since opening in 1968, making it Hopatcong's oldest pizzeria, The Grotto has offered a mix of Italian and American cuisine for lunch and dinner. Hopatcong resident Todd Acuna has owned the River Styx Road landmark since 1999.
- Hours: Monday-Tuesday: 4 to 10 p.m. Wednesday to Thursday: Noon to 10 p.m. Friday: Noon to 11 p.m. Saturday-Sunday: Noon to 10 p.m.
- Handicap Accessible: Yes
- Founding Date: 1968
- Payments accepted: American Express, Cash, Debit Card, Discover, MasterCard, Personal Check, Visa
- General services: Catering, Delivery, Eat-in, Phone orders, Take-out
- Parking: Free lot
- Cuisine: American, Italian
- Price level: $
- Features: Dinner, Lunch