Thermopylae (; Ancient and Katharevousa Greek: , Demotic: Θερμοπύλες : "hot gates") is a place in Greece where a narrow coastal passage existed in antiquity. It derives its name from its hot sulphur springs. The Hot Gates is "the place of hot springs" and in Greek mythology it is the cavernous entrances to Hades".

Thermopylae (; Ancient and Katharevousa Greek: , Demotic: Θερμοπύλες : "hot gates") is a place in Greece where a narrow coastal passage existed in antiquity. It derives its name from its hot sulphur springs. The Hot Gates is "the place of hot springs" and in Greek mythology it is the cavernous entrances to Hades".