There are turn offs every 2-3 miles through the Turnagain Arm pass that were different views with short hikes to waterfalls.
We did the half day 4 hour wild life cruise. It was worth it! We were lucky enough to see 4 Orcas swimming in the Gulf along with a lot of bald eagles and sea lions. Even on a rainy day would do it again. If you are staying at Harbor 360 you will get a discount for your cruise.