Earth's core

The Earth's core is the interior of Earth. During season 3 of the, the is located there, following the  sending it there at the end of Return of the Technodrome. The Technodrome seems able to stand the lava and heat.

Throughout season 3,, , and  rely on Transport Modules to move between the Technodrome and Earth's core. In the Big Trilogy, the Technodrome finally resurfaces before the Ninja Turtles send it to Dimension X.