Didyma Sinkholes

At the foot of Mount Didymos in Argolida, travelers will find one of the most extraordinary geological wonders in Greece: the Twin Craters of Didyma—also known as the Didyma Sinkholes or the Twin Caves. These massive dolines were formed thousands of years ago, most likely by landslides caused by underground water activity. Almost perfectly circular and strikingly similar in size, they have fascinated locals and visitors alike for centuries.

From above, the craters appear as an awe-inspiring, otherworldly landscape, visible from great distances. The Large Doline lies at the base of the mountain, while the Small Doline opens up in the valley. The smaller crater is especially impressive, plunging 80 meters deep with a diameter of 150 meters. Adventurous travelers can even descend into it through a narrow, cave-like entrance.

Byzantine Churches Inside the Crater

What makes the Didyma Sinkholes truly unique is the presence of two historic churches hidden inside the Small Doline: the Church of Agios Georgios (Saint George) and the Church of the Metamorphosis (Transfiguration). Both chapels are carved directly into the rock and date back to the Byzantine and post-Byzantine periods (11th–14th century).

Inside St. George’s Church, visitors can discover rare Latin inscriptions, including one marking the passage of Thomas Palaiologos, Despot of the Peloponnese, as well as a remarkable stone baptistery—a testament to the site’s spiritual and cultural significance.

Why Visit the Twin Caves of Didyma?

• Unique Natural Landmark – A rare geological formation in Greece, perfect for photographers and nature lovers.
• Hidden Heritage – Byzantine chapels carved into the crater walls.
• Easy to Reach – Located in Argolida, making it an ideal stop on a Peloponnese Road trip.

Whether you are drawn by nature, history, or spirituality, the Twin Craters of Didyma promise an unforgettable journey into one of Greece’s most mystical landscapes.