Mumbai mystery: Andheri's 66-million-year-old best-kept 'secret', Gilbert Hill

Nov 22, 2017, 09:00 IST

A 200-ft-high Gilbert Hill is a volcanic structure from the Mesozoic era believed to have been formed at the time of the mass extinction of dinosaurs due to an asteroid hit. Pic/Sayyad Sameer Abedi

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Tucked inside the concrete maze of Andheri West in Mumbai is a 66-million-year-old volcanic structure. Here are few things that you may not know about the city's or India's best-kept 'secret'