Grayson Springs. Site of famous spa started in mid 1820's, owned by M. P. Clarkson, and known for healing powers of its mineral water springs. Resort reached its height in 1900 under ownership of Mercke brothers. Also home of St. Augustine's, first Roman Catholic Church in Grayson County, founded in 1815 by Father Charles Nerinckx, one of the great pioneer missionaries of Kentucky.