Cactus island!
In the middle of the salt plains in southern Bolivia is a an oasis of an island where hundreds of cacti plants exist called Isla Incahuasi!
To access the island, it is best to be booked through a group tour from the city of Uyuni. Once there, you can take a hike through the island and discover the different plants that are there and how old they are. There are toilets and lots of information at the island as well as a small admission fee.