Adjacent to Mendenhall Glacier, Juneau offers the chance to go dogsledding or flightseeing over a vast icefield. Yachting along Tracy Arm and Endicott Arm provides breathtaking views of these glaciated fjords, along with opportunities to observe humpback whales, orcas and sea lions. Towns ashore lend insight into human history in sites like Castle Hill in Sitka, where Alaska was transferred from Russia to the U.S. in 1867.