page_title: Tunnel of Eupalinos
hierarchical_section_title: Tunnel of Eupalinos
caption_attribution_description: English: Inside the Tunnel of Eupalinos (Eupalinian aqueduct) in Samos, Greece
context_page_description: The Tunnel of Eupalinos or Eupalinian aqueduct is a tunnel of 1,036 m length running through Mount Kastro in Samos, Greece, built in the 6th century BC to serve as an aqueduct. The tunnel is the second known tunnel in history which was excavated from both ends, and the first with a geometry-based approach in doing so. Today it is a popular tourist attraction.
context_section_description: The Tunnel of Eupalinos or Eupalinian aqueduct (Greek: Ευπαλίνιον όρυγμα, romanized: Efpalinion orygma) is a tunnel of 1,036 m (3,399 ft) length running through Mount Kastro in Samos, Greece, built in the 6th century BC to serve as an aqueduct. The tunnel is the second known tunnel in history which was excavated from both ends (Ancient Greek: ἀμφίστομον, romanized: amphistomon, "having two openings"), and the first with a geometry-based approach in doing so. Today it is a popular tourist attraction.
caption: Inside one of the most spacious parts of the Eupalinian aqueduct.
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