Ketchikan Shore Excursion: Alaska Rainforest Sanctuary Walking Tour. Spend your time in port in Ketchikan exploring the fascinating wilderness of the Alaska Rainforest Sanctuary. Easily accessible from your cruise ship, this 2.5-hour walking tour will teach you about Alaska’s diverse ecosystem as you follow an informative guide through the wilderness. Stroll through a beautiful forest, see Alaska’s dramatic mountains, and keep and eye out for local wildlife. You’ll see a scenic marine estuary and have the opportunity to take striking photos. Book now and Save 10%: Ketchikan Zipline Adventure.