Mzima Springs in Tsavo West National Park is a series of four natural springs of crystal clear water gushing out from underneath the dry lava rock. This two-kilometre-long stream is a heavenly pool for hippos and crocs, who come here to cool down. You need to be lucky, but if they are there, you can watch them from above or through a window in an underwater tunnel below the spring. The super clear water allows you to see every tumble and turn – a joy to watch!