 Stones unsuitable for architectural use were made into shoebox-sized paving stones that were used on the streets of St. Louis as well as on its wharf on the Mississippi River.Stone quarried in the area currently is used for mortuary monuments and is known commercially as Missouri Red monument stone.A one-mile (2 km) circular interpretive trail in the Elephant Rocks Natural Area, called the Braille Trail, is the first in Missouri state parks designed specifically for visitors with visual and physical challenges.