You will find Isthmia East of the Corinth Canal, known since ancient times as a place of worship. The temples of Poseidon and Palaemon, and the numerous discoveries that are hosted in the Archaeological Museum of Isthmia attract visitors. Throughout ancient times the city hosted the Isthmian sport games held in honor of Palaemon. Participation in the games was open only to men, and the winners were crowned with wreaths made of pine branches or agrioselino (a type of wild celery). In later years, music and recitation contests were added to the festivities, in which the participation of women eventually was allowed. Traces remain of the theater where the musical contests were held, and ruins of a Roman bath dating from the second century AD, built atop the preexisting Greek baths of the fourth century BC.

Temple of Poseidon: The Archaic temple was constructed during the seventh century BC, but was unfortunately destroyed by fire in the fifth century BC. It was subsequently rebuilt according to a Doric peripteral plan, from local Korinthian limestone, but was destroyed again in 390 BC. Again rebuilt, it flourished until 146 BC when the Roman consul Mummius destroyed the city. In 44 AD it was again rebuilt, but took its final form including the courtyard and colonnades during the second century AD.

The Ancient Theatre of Isthmia: Unfortunately has not survived, its members having been harvested for the later construction of the medieval fortress located there. Only the foundations of the orchestra (stage), portions of the cavea (seating area )and the proscenium, and some scattered stones remain.

The Palaemonio: A temple next to that of Poseidon, it was dedicated to Palaemon, a sea deity of the Roman era. The temple had a special courtyard, as well as pits for sacrifices.

Stadium of Isthmia: The stadium used to be located south-east of the temple of Poseidon. Unearthed by excavations, the ancient stadium at one time featured a sixteen-lane running track. More recently, the stadium was rebuilt into the existing hollow of the previous stadium, with a length of approximately 181m.

Opening hours: daily 8.30-15.00