There’s a volcano up here alongside the Northern Line. Granted its a rather little one. But it’s caldera is clearly noticeable from satellite imagery.
Its one of only two volcanos in Thailand, and the other is down near the Cambodian border, and has a temple built on the caldera to honour the god of destruction.
Yet, I can barely find anything about this volcano apart from its ridiculously long name, and its height 399 metres. But don’t worry – it hasn’t erupted for almost a million years, and there’s about 25km of intra-plate continental crust between you and all the magma.