SS President Coolidge
Where it can be found: Vanuatu
The ship was originally built as a U.S. luxury ocean liner, but it served as a WWII troopship from December 1941 until October 1942. She was eventually sunk by mines in Espiritu Santo in the New Hebrides.
Source: Indepth Scuba
The ship was full of military gear, including howitzer cannons, a General Motors Corporation truck, and other tracked vehicles that can be still found in the wreck. Curious divers can explore this huge wreck on both shallow as well as deep dives.