No. Sea voyage to nowhere, then spend hours in a tiny submersible descending to the sea floor only to see mud.
When the Trieste made her historic dive to Challenger Deep, the two crew members saw a flat sole like fish on the bottom. That is pretty amazing, being over 30,000 feet down. And they only had a few minutes of viewable time at the bottom due to so much silt being kicked up and taking a long time to settle.
Also, you turn off all the lights and get an amazing light show due to all the bio luminescent creatures.
For me, the draw would be the chance to see all sorts of strange and fascinating sea life, but I have been interested in that sort of thing ever since I was a kid and saw my first angler fish.