2 entries match your criteria. Related Historical MarkersDionicio Rodriguez also worked on the Crystal Shrine Grotto in Memphis, Tennessee; Ralph Corona also worked on bridges on the W. H. L. McCourtie Estate in nearby Somerset Center, Michigan. By Ken Smith, September 26, 2006 Crystal Shrine Grotto Marker SHOWN IN SOURCE-SPECIFIED ORDER 1 ► Tennessee, Shelby County, Memphis, East Memphis — Crystal Shrine Grotto — On Poplar Avenue (U.S. 72) at Oakhaven Road, on the left when traveling east on Poplar Avenue. 2 ► Michigan, Hillsdale County, Somerset Center — S0624 — W. H. L. McCourtie / W. H. L. McCourtie Estate — On Chicago Road (U.S. 12) at South Jackson Road, on the right when traveling west on Chicago Road. ︽