The 2,000-year-old inner harbor of Alexandria Troas in Çanakkale’s Ezine district has once again turned pink, forming a heart shape. Once a major trade hub, the harbor became a lake after losing its sea connection. Its pink color is caused by the microscopic organism dunaliella salina, which thrives in high salinity and warm temperatures. Known as one of the world’s eight pink lakes, the site attracts tourists and social media attention each year.