Completely explored in the 70s, the aqueduct carried water from a source located on the northern slope of the Ampelos: the water was collected in a large cistern and passed through terracotta pipes, through which it reached the tunnel.

The tunnel crossed the Ampelos for a length of 1045 m and was composed of two parts: an access and a lower gallery through which the pipeline itself passed.

The first, 1.90 m high and 63 cm wide, is dug into the rock. Only in some sections was an artificial arrangement with large limestone blocks and a gable roof necessary. At the bottom of this upper passage, a series of wells were dug, from which the opening of the canal was opened, barely 1.50 m high, in which the terracotta conduit was located. The exit of the tunnel was inside the wall and, from here, the conduit continued to one or more sources that have not yet been located.

On the walls of the upper tunnel, the inscription paradeigma had been painted in archaic characters, indicating the "model" to follow in the work. A horizontal line runs along the entire lower gallery that indicated the exact level that had to be followed in the excavation. This achieved a fairly regular slope of 0.4%. Every 63 m there is a vertical sign, which has a number and a name next to it, that of the person responsible for each of the work groups.

• - Wikimedia Commons hosts a multimedia category on Eupalino Tunnel.

• - Dan Hughes: The Tunnel of Eupalinos.

• - Michael Lahanas: The Eupalinos Tunnel of Samos.

• - The Eupalinian aqueduct by the Greek Ministry of Culture.

Completely explored in the 70s, the aqueduct carried water from a source located on the northern slope of the Ampelos: the water was collected in a large cistern and passed through terracotta pipes, through which it reached the tunnel.

The tunnel crossed the Ampelos for a length of 1045 m and was composed of two parts: an access and a lower gallery through which the pipeline itself passed.

The first, 1.90 m high and 63 cm wide, is dug into the rock. Only in some sections was an artificial arrangement with large limestone blocks and a gable roof necessary. At the bottom of this upper passage, a series of wells were dug, from which the opening of the canal was opened, barely 1.50 m high, in which the terracotta conduit was located. The exit of the tunnel was inside the wall and, from here, the conduit continued to one or more sources that have not yet been located.

On the walls of the upper tunnel, the inscription paradeigma had been painted in archaic characters, indicating the "model" to follow in the work. A horizontal line runs along the entire lower gallery that indicated the exact level that had to be followed in the excavation. This achieved a fairly regular slope of 0.4%. Every 63 m there is a vertical sign, which has a number and a name next to it, that of the person responsible for each of the work groups.

• - Wikimedia Commons hosts a multimedia category on Eupalino Tunnel.

• - Dan Hughes: The Tunnel of Eupalinos.

• - Michael Lahanas: The Eupalinos Tunnel of Samos.

• - The Eupalinian aqueduct by the Greek Ministry of Culture.