Boaters watch cliff collapse along Lake Superior

A cliff wall broke away at a national park along Lake Superior in northern Michigan, stunning some boaters who captured it on video. More local videos here: https://bit.ly/2Pa0d1lSubscribe to NEXT: http://bit.ly/2eP1GwIStay connected:9NEWS Website: http://www.9news.com/Facebook: https://www.facebook.com/ilike9newsTwitter: https://twitter.com/9NEWSInstagram: https://www.instagram.com/9newsdenver/Download the 9NEWS App: https://www.9news.com/appredirect/Sign up for the 9NEWSLETTER: https://www.9news.com/email9NEWS (KUSA) is located in Denver, Colorado.