Monastery of Saint Gerasimus, Kefallonia, Monastery in Valsamata, Kefallonia, Greece.

The Monastery of Saint Gerasimus is a religious complex located in the Omala Valley featuring a main church, multiple wells, and underground chambers integrated into the site. Three ancient plane trees provide shade across the grounds.

The monastery stands on the site of a 1200 monastery from the Crusader era, rebuilt by Saint Gerasimus after the priest Georgios Valsamos granted him the land and he settled there in 1561. Gerasimus, a monk from Trikala in Corinthia, died on 15 August 1579 and was canonised in 1622. The monastery was later rebuilt again; in 2021 it counted 14 monks.

Villagers from Valsamata call the monastery "New Jerusalem". Its feast days are celebrated on 16 August and 20 October, and the saint's relics are kept in a silver casket inside the monastery, where pilgrims come to venerate them.

The site is accessible by car or taxi from Argostoli with regular transportation services available from the airport and major towns. Visiting outside the hottest summer months provides more comfortable conditions for walking around the grounds.

Beneath the church lie two underground rooms that served as the saint's hermitage, reachable through a narrow staircase hidden within the building. These hidden chambers reveal how the founder lived in isolation and devotion.