Tonga Trench

The world's second deepest ocean trench, the Tonga Trench in the South Pacific, is drawing renewed attention online after viewers shared an explainer on why it is rarely mentioned alongside the Mariana Trench. The trench plunges to roughly 10,800 metres near the Tonga-Kermadec subduction zone, yet remains far less explored and far less publicised than its famous neighbour.