1. The residents were busy refurbishing underground bunkers . 2. I will take you first to an underground mine 3. They're all on their way back underground now. 4. In the underground, gems and precious-stone works are found. 5. First underground water canal is also going to be built in Mumbai. 6. We now have a whole underground marketplace 7. This is one of the largest underground labs in the world. 8. India's first underground water-way is also planned to be made in Mumbai. 9. India's first underground water tunnel is going to be made in Mumbai only. 10. We call it Gapminder, from the London underground, where they warn you,
