Mount Longonot, Kenya
Mount LongonotAs soon as they see it along the Great Rift Valley, hiking enthusiasts want to climb Mount Longonot, a dormant volcano that last erupted sometime in the 1860s. The name Longonot is derived from a Masai word that means "steep ridges"—fitting because the journey to the top is nearly vertical, along deep crevices and crumbly rocks. Summiting usually takes about 1.5 hours; from the top, peer into the forest-filled crater and sit under a shaded gazebo to enjoy a picnic. If you have the energy, it’s also possible to hike the rim of the crater, but be warned: Skirting around takes roughly three hours, not including the journey back to the bottom.