There are a number of Wreck dives around Pattaya.
The most famous is the Hardeep Wreck (SS Suddhadib) laying at 28m. Close to it are the T94 and T95 wrecks that were purposefully sank in 2022 at roughly 22m. All wrecks are located close to Koh Samaesan
Closest to Pattaya (near islands) is the HTMS Kut, a World War II U.S. landing ship which lays at 31m and the HTMS Metaphorn laying at 23m. Further a field is the HTMS Khram sitting at roughly 28m.