1. Going-to-the-Sun Road
What is it? A treacherous 50-mile drive through Glacier National Park, ending up at Logan Pass, 6,646 feet above sea level.
Why go? Catch cheap thrills (it’s free) around every corner of this engineering marvel, which is usually open late June through October, weather permitting, and is on the National Register of Historic Places. The view from the top is worth the hair-raising drive.