Although there is so much in Alaska to see, my all time favorite shore excursion is flightseeing over Misty Fjord, an already glaciated part of southeast Alaska. You fly over fjords with waterfalls falling into them, mountain lakes (you even land in one). the silence is overwhelming. You, the other passengers, the crew and the plane are the only signs of human habitation on the earth. Absolutely awesome. I loved the helicopter tour, but the one that made the biggest difference for me was Misty Fjords.