Runfire Cappadocia Ultra Marathon, Turkey

Who: 120 runners

When: July 25, 2015

Why it's unique: This race turns sight-seeing into a test of survival as you run though Cappadocia, Turkey's adventure wonderland of alien rock formations, sun drenched canyons, and ancient cave dwellings, on a six-day, 150-mile marathon that passes though must-see attractions like Pigeon Valley, Damsa Lake, Ihlara Valley, and Göreme Valley, camping the entire length of the way. [runfirecappadocia.com]