Yellowbrick Supervolcano

The Yellowbrick Supervolcano, often referred to as the Yellowbrick Volcano or as Mt. Yellowbrick by locals is an extinct volcano located at the heart of the Yellowbrick Valley, 10 miles (16 km) northwest of downtown Yellowbrick.

Despite being located near a bustling city, the volcano poses no threat to it and is very unlikely to erupt anytime soon, as it's last eruption was over a milennium ago.