Sandy Beach is a beach.
Marge mentioned the family's trip to Sandy Beach while recounting times when she had been embarrassed on family vacations. At Sandy Beach, Homer had a fake shark fin on his back and swam near the beach, scaring everyone in the water. While laughing at his joke, Bart appeared next to him, laughing and wearing a fake shark fin on his back too. When Homer saw him, he shouted "Aaagh! Sharkboy!" and ran away.