Its ruins are located to the south of the modern town of Sığacık in the Seferihisar district of Izmir Province, Turkey.

[2] Teos was a flourishing seaport with two fine harbours until Cyrus the Great invaded Lydia and Ionia (c. 546 BC).

A shipwreck near Tektaş, a small rock outcrop near Teos harbour, dates from the Classical period (around the 6th to the 4th centuries BC) and implies trading connections by sea with the eastern Aegean Islands.

Vitruvius notes Hermogenes of Priene as the architect of the monopteral temple of Dionysus at Teos.

The interior of what was previously the city has now been intensively farmed, which makes it difficult to excavate the site.