Tezla's Cube is a location in both HW: World Race and Acceleracers.

World race tezla cube

It has several hot wheels logos on it in HW: World race and has faded paint in Acceleracers. The first to find it (Other than Dr. Tezla) were Accel, Syn, and Noble. Eventually other drivers such as Zelix and Maddog found the cube.

It is where all the sections of the World Race were accessed.

Acceleracers tezla cube

After the final episode of Acceleracers, it is never seen again.