The 20,000 Leagues Hotel is located just below (on the map) the Tokyo Disney Celebration Hotel--through a partial acquisition of the Uraysu City Sogo park. Although not technically on the bay (as there is a roadway that separates the hotel from the water), nonetheless, the hotel offers a significant number of harbor-view rooms. The hotel is located near the Shin-Urayasu Station, which is a approximately 20 minute journey via a complimentary shuttle from Tokyo Disneyland and Tokyo DisneySea parks.
The shop at the hotel sells the typical sundries and Tokyo Disneyland Resort gear but also has a special section for items related to 20,000 Leagues Under the Sea (similar to those found for the ride's 23rd anniversary including Captain Mickey and Scuba Donald).
Walking paths at 20,000 Leagues Hotel use sea green poles and guardrails as well as burnt yellow pathways as also found at Mysterious Island at Tokyo DisneySea.
The interior of the hotel looks to emulate the feeling of being a crew member on a submarine, while providing a more luxurious and aesthetically pleasing nautical look, concept art for both the lobby and a sample room can be found below.
Next: Hotel Dining