Gate of Apollon Temple

The most famous landmark of Greece's Naxos Island is the Portara, a massive 2,500-year-old marble doorway that leads nowhere!
The Portara stands on Palatia, which was once a hill but is now a separate little island connected to Naxos by a causeway. (The Mediterranean has risen significantly since ancient times.)

The Portara is the entrance to an unfinished temple that faces directly toward Delos, Apollo's birthplace. For this reason most scholars believe it was dedicated to Apollo, but some think it was built in honor of Dionysus, who was worshipped on Naxos Island.