While it's not on the same level as the one-two masterpiece punch of director James Cameron's two previous efforts, The Abyss still does well enough with its underwater sci-fi adventure premise with it being somewhat ambitious in several cases while also keeping a steady pace despite its drawn-out runtime.
Aside from those distinguishing features, the main attractions to be typically found in The Abyss would no doubt have to be the whole submerged backdrop and special effects used throughout.
Although it unfortunately lacks some sort of palpable tension at times, the way Cameron filmed the scenes down under are absolutely something to behold and are rather authentic all around.
The special effects utilized here add to that natural credibility as well. This was one of the first films to ever use CGI, and it thankfully holds up quite well today, especially within The Abyss' final act.