A Viking vessel is housed at the Hjemkomst Center in Minnesota. A wooden crate in Texas is believed to hold a medical miracle. These are among the thousands of museum artifacts that reveal fascinating tales about America’s rich past. In the upcoming seventh season of the popular Travel Channel series, “Mysteries at the Museum,” history explorer Don Wildman continues to scour the United States, unearthing extraordinary relics that share a new perspective to some of our country’s most intriguing stories.