Take an 8 km adventure into Kythnos’ hidden underground world, where mining history and nature meet. The hike begins at Lefkes beach, next to the old bridge once used for loading ore. Enter the iron mine galleries, where ore veins and rusted rails still remain. Along the dark tunnels, discover Archaia spring, a vital ancient water source. Emerging back into sunlight, the trail reaches Sifnios beach, one of the most isolated and pristine on the island, before looping back to Lefkes. A thrilling mix of exploration and seaside beauty.
Difficulty
Easy
Duration
4h
Group size
2-8 tourists,
over 14 y.o.
over 14 y.o.
Only in the Hiking Trekking Club
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Apostolos G. is the provider of this trip
The provider speaks: English
Our team is more than just mountain leaders; we’re a family of outdoor enthusiasts, nature lovers, and seasoned explorers. Each member brings a unique set of skills and a shared passion for creating unforgettable hiking experiences.
Tour highlights

Mine Tunnels
Walk inside abandoned iron galleries.

Sifnios Beach
Remote bay with colored sands.

Archaia Spring
Ancient freshwater source.
Route details
- Start at ancient aqueduct.
- Hike through herbal slopes to Vryokastro citadel.
- Descend to Apokrousi beach for swimming/kayaking.
- Return via herb-lined trail.
Difficulty
Easy
Minimal physical activity. Suitable for everyone regardless of fitness and age
It's important to know
Cancellation of booking
In case of booking cancellation the next policy applies. Tourists will receive a full amount they paid for the reservation in case they cancel more than 35 days in advance of the tour start date. In the event of cancellation within the period of 34 to 16 days before the tour start date - they are entitled to receive 50% of the booking amount. Cancelations made within 15 days before the tour starts will not be entitled to a refund.
Available dates
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Duration 4h
Preferred time
Number of individuals
2-8 tourists, over 14 y.o.
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Tickets to group meeting place
Group meeting place
Kythnos
The group meets at: Kythnos
The tour’s last location: by arrangement with the provider
Weather during the tour
Weather conditions along the route
You will get a weather forecast for this tour’s route based on
- the forecasts for this season
- the statistics from previous years’ trips
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