Last year, hundreds of thousands of refugees boarded flimsy boats on the coast of Turkey hoping to make it to Europe. Photojournalist Harry Chun set out to document that journey by making it himself. Chun started in Istanbul and made his way to Europe with a group of Syrian and Iraqi refugees. Then, as border closures forced desperate migrants to change their route, he returned to keep documenting the ever-shifting journey. The images he captured along the way are a rare glimpse into the greatest refugee crisis since World War II.