Stella Maris City is a fictional city in the book "Twenty Thousand Leagues Under the Sea" by Jules Verne. It is described as a utopian underwater city located at a depth of 300 meters in the Pacific Ocean. The city is inhabited by a group of scientists led by Captain Nemo, who have created a self-sustaining society with advanced technology and architecture. It is known for its beautiful gardens, futuristic buildings, and high-quality educational institutions. The city is regarded as a symbol of progress and innovation in Verne's novel.