I guess I was a little off the mark lol

The world's deepest cave system only extends about a mile downwards. The Taratoga gold mines of South Africa could take you close to the 2-mile mark, but your best bet is to start tunnelling from the Mariana Trench. This is the deepest ocean trench, plunging 7 miles (11km) down under the Pacific Ocean.
RESiNATE Reviewed by RESiNATE on . For Torog I guess I was a little off the mark lol The world's deepest cave system only extends about a mile downwards. The Taratoga gold mines of South Africa could take you close to the 2-mile mark, but your best bet is to start tunnelling from the Mariana Trench. This is the deepest ocean trench, plunging 7 miles (11km) down under the Pacific Ocean. Rating: 5