More than 2,000 native plants are thriving under the care of a 20-woman-strong gardening team at the Gurukula Botanical Sanctuary in Kerala, India. This is one of the "world's hottest hot spots of biodiversity," said The Guardian, and in the last four decades, the sanctuary has grown from 7 acres to 79. Deforestation and climate change threaten the region, but Gurukula stands out as a "Noah's Ark for endangered plant species," including different types of rare impatiens and ferns.