1. Michigan: Bordered by Indiana to the west, Michigan is known for its beautiful scenery, including the Great Lakes and abundant forests.
2. Ohio: Located to the east of Indiana, Ohio is home to major cities such as Columbus and Cleveland, as well as the Rock and Roll Hall of Fame.
3. Kentucky: Indiana's southern neighbor, Kentucky is famous for its bourbon production and natural wonders like Mammoth Cave National Park.
4. Illinois: Bordered by Indiana to the west, Illinois is known for its major metropolis, Chicago, as well as its agricultural industry.