Portara of Naxos
Naxos and Lesser Cyclades Municipality, Greece
The Temple of Apollo, or Portara (meaning 'large door'), was an ancient Greek temple in Naxos, dedicated to the god Apollo. The temple was constructed in the 6th century BC by the tyrant Lygdamis. It is located on the islet Palatia at the northern end of Naxos' harbor. This islet is commonly thought to correspond to the place where, in Greek Mythology, Theseus abandoned Ariadne, who was then abducted by Dionysus and his entourage. The islet is connected to the town of Naxos by a causeway built in 1919.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).