The descent into the underworld — stacked hairpins above rivers of magma.

Tartarus Descent drops 35 meters from the rim of a volcanic pit into the underworld, through a spiral of hairpins cut into black and violet rock. Magma rivers glow below the road, iron gantries cross overhead and braziers mark every entry.
It is an Extreme-rated course built around braking, not top speed: three stacked hairpins arrive one after another with barely a breath between them, and a blind kink returns you to the rim.