German photojournalist Mario Gerth has captured the incredible, dramatic landscape of northern Ethiopia in this collection of stunning black and white images. It includes shots taken in the Simien Mountains and the rock-hewn churches of Lalibela. Mario trekked more than 350 miles by foot and donkey through one of the Africa’s remotest regions. He found monks praying with 600-year-old Bibles, and farmers and shepherds whose methods haven’t changed in thousands of years. I trekked in these mountains a few years ago, and...