In the depths of the ocean, an expansive view reveals a magnificent steampunk submarine, its brass exterior gleaming with a patina of age. Inspired by the legendary Nautilus of Jules Verne, the vessel is adorned with an array of intricately designed gears and pipes, with glowing portholes casting an eerie light in the aquatic darkness. Mechanical tentacles extend from its hull, resembling an enigmatic sea creature, as schools of bioluminescent fish swirl around, illuminating intricate etchings and rivets that hint at countless adventures beneath the waves.