If you wish to go back in time and explore something truly interesting, this group of 19 hillside caves should feature on your places-to-see list. Carved out of black solid basalt between the 1st century BCE and 6th century CE, these ancient caves housed Buddhist monks once. They are also known as Kondivite Caves and boast a Buddhist Stupa as well as Pali scriptures on many walls. 

Among the must visit places in Mumbai for exploring.