Ever wanted to spontaneously book a tour on the same day you take it? This short walking tour of the Basilica Cistern will have you seeing the largest underground cistern in Istanbul, Turkey – in just two hours! You can also choose from multiple start times for a time that suits you. The Basilica Cistern is an ancient underground water storage facility in Istanbul, Turkey, dating back to the 6th century. It is known for its forest of 336 marble columns and its surreal atmosphere. This impressive site is a must-visit destination for anyone interested in the history and architecture of Istanbul. In this guided walking tour, you’ll get to skip the long lines at the entrance and go straight inside! You won’t have to waste your time waiting and get to the good stuff. You’ll have a friendly and knowledgeable tour guide who will explain the rich history and significance of the cistern and even help you take your photos.