Tracy Arm is one of the must see places near Juneau. If you are not traveling in your own boat you can jump on one of the fast excursion boats that make the run from Juneau each day. A classic fjord with walls that tower thousands of feet above, waterfalls everywhere, and icebergs to make navigation interesting as you make your way up the glacially carved canyon. The terrain beneath the water is just as dramatic, not unusual to be a few hundred feet from shore with a thousand feet of water below the keel. In some places the depth finder can not find bottom, over 1,200 ft or more down.
At the top there is Sawyer Glacier, a tidewater glacier that drops those icebergs into the water as you watch. There are actually two glaciers, in twin arms of the fjord that separate near the end of the trip. Sit among the ice flows watching the seals and ice crashing from the cliff-like face. If you can time your arrival for high tide it is far more likely to see a really big calving, with hundreds or thousands of tons of ices breaking free from the face to crash into the water and create waves that rock the boat.
It is customary to scoop up some of that glacial ice floating around to fill your coolers. Crystal clear and very dense, the ice from the bottom of the glacier is interesting stuff. We break it up and make cocktails out of it to enjoy as we cruise back down the fjord.