Translated from the official website of the Austrian Alpine Club (https://www.alpenverein.at/weitwanderer/weitwanderwege/nordalpenweg.php)

Ol Doinyo Lengai is known as the “Mountain of God” by the native Maasai living around the mountain. It is an active volcano with a perfectly symmetric cone. When you climb over the rim of the crater, you can see and hear the lava bubbling and spewing inside. The volcano has a uniquely cold type of lava, and a sign at the top claims that the lava is the coolest in the world.

This is a classic 5 peak traverse around the Train Glacier in the Railroad Group of mountains near Semaphore Lakes. Initially known as the 'Railroad Traverse' back in 2008 or even earlier, has become popularized in recent years. Typical route is CCW of Face, Faceless, Caboose, Tender and Locomotive mountains.