Discover the Basilica Cistern, one of the top attractions in Istanbul and a mesmerizing underground wonder. This ancient reservoir, built in the 6th century, features 336 towering columns and mysterious Medusa heads. Stroll along illuminated walkways, capturing stunning reflections in the still water. Marvel at the Hen’s Eye Column, carved with tear-like designs, and the ornate Peacock-Eye Column. The cistern ranks among the best things to do in Istanbul for history lovers and photographers. Don’t miss its haunting legends and occasional light shows. A visit here is a must-see in Istanbul, blending mystery, art, and engineering. Explore this hidden gem beneath the city’s bustling streets.