The little visited Chyulu Hills NP is an extension of the more popular Tsavo West NP. The green Chyulus are one of the youngest mountain ranges in the world, having been formed only about 500 years ago. The volcanic scenery is fascinating, but human encroachment with cattle and poaching are major problems.
There isn't much wildlife around. A worthwhile activity is a visit to the Upper Leviathan Cave, which at 11.5km long, is one of the longest caves in the world.
Chyulu National Park