Star Princess and Celebrity Millennium cruises docked at the South Franklin dock, Juneau, Alaska. Sightseeing seaplanes parked at the water front in Juneau dock Alaska. Downtown Juneau sits snugly between Mount Juneau, Mount Roberts and Gastineau Channel, and is a maze of narrow streets running past a mix of new structures, old storefronts and quaint houses featuring early 19th century architecture left over from the town’s early gold mining days. The waterfront bustles with cruise ships, fishing boats and floatplanes zipping in and out. With no road access to Juneau, it is the only state capital in the United States that can only be reached by airplane or boat.