Mississippi River and Tributaries: Expertise in the Upper or Lower Mississippi, Ohio, or Tennessee and Cumberland Rivers, with topics such as the Civil War, the Louisiana Purchase, agriculture and industry, river navigation, music, culinary traditions, Native American cultures, Mark Twain and literature, floods and river management, and historic architecture. Great Lakes: Native American cultures, French and British exploration, the War of 1812, maritime heritage and shipwrecks, lighthouses, immigration and industry, historic cities and architecture, music and art, culinary traditions, and wildlife and ecology.