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From the Greece World / Places
Tunnel of Eupalinos
Enter Samos’s ancient aqueduct tunnel to appreciate the engineering of a passage excavated through solid rock. The underground visit gives a rare physical sense of how its builders solved a demanding water-supply problem.
Why go
The rock-cut aqueduct reveals the remarkable accuracy with which two ancient crews met inside Mount Kastro. Visitors currently choose a 185 m or 424 m route; the full 1,036 m route is temporarily closed. Because entry is by appointment and winter is closed, this requires advance planning on Samos.
What to look for
Follow the excavated passage on the 185 m or 424 m route offered.
Useful to know
Book ahead through the official operator and confirm which tunnel route is open; wear suitable shoes for the underground passage.
Your next visit
Estimated · Declared scenario and planning estimates; no live opening, weather, queue or booking service.
Outdoor visit · 45–90 min
World planning estimate; admission, opening, visit duration and access need checking.
