That's not accurate... Anymore.
The one they had at Castaway isn't there anymore. Don't know when they took it away or why, but it's gone. There used to be one there in the sand for kids to climb on too, but that one is gone as well.
Of course, there's one in Tokyo and Paris... But they're not from the original fleet.
Other than that, there's part of one backstage at Epcot that is used for special events from time to time.
TONS of info on where the subs are buried (including pics) and what happened to the rest of them are detailed at
www.20kride.com ... That's a GREAT site, tons of fun and a good read. There's even a picture of the sunk one at Castaway, along with the pair docked near the cruise ship. It doesn't get much cooler than that.
And the first hand account on that website of swimming over the top of the sub was mine.
Here's a link to the page with pics of everything after the ride closed... Including the pics I described earlier. My account of swimming over the top of the sub is right under the pic.
http://20kride.com/photos_after.html