Podcast Tour The Crystal Miracle How Annecy Saved Its Lake

Overview

Discover the incredible, hidden story of Lac d'Annecy. Today, it sparkles as Europe's cleanest lake, but in the 1950s, it was a dying, foul-smelling biological dead zone. Join an urban planner and a local environmental historian as they guide you through the political miracles, the scientific awakenings, and the massive, invisible engineering feats that resurrected these alpine waters. This is a story of civic courage, ecological stewardship, and the power of a community that refused to let its natural heritage slip away. - A 3.1 km self-guided tour with 6 stops over 100 min - Ideal for travelers interested in Urbanism, Infrastructure & Innovation and History & Memory - Immersively told in a podcast style by experts and locals - Matching audio content, AI guide and navigation through the app

Itinerary

1. Hôtel de Ville d'Annecy

   The political birthplace of the lake's rescue, where an unprecedented intercommunal syndicate was formed in 1957.

   · 10 min

2. Housed in the historic castle, this observatory monitored the lake's biological death and eventual miraculous recovery.

   · 10 min

3. Jardins de l'Europe

   The site of the shocking 1950s 'red algae' blooms that visually and olfactorily horrified the public into action.

   · 10 min

4. Pont des Amours

   A romantic landmark that historically served as an open sewer, highlighting the dramatic contrast of the restoration.

   · 10 min

5. Le Pâquier d'Annecy

   The vast lawns hiding the massive, 40km+ underground collector ring that intercepts all wastewater.

   · 10 min

6. Plage Des Marquisats

   The public beach that represents the ultimate payoff of the restoration, boasting pristine waters.

   · 10 min

How to use your ticket

Thank you very much for your booking! We are excited to give you a fantastic tour experience with the Red Thread app. Since this is a self-guided tour, you enjoy total freedom: start whenever it suits you — at your own pace, with no fixed timetable or group. Here is how to redeem your voucher: 1. Download the app: Install the free "Red Thread: Discover Home" app from the Apple App Store or Google Play. Apple App Store: https://apps.apple.com/de/app/red-thread-discover-home/id6757938513 Google Play: https://play.google.com/store/apps/details?id=com.voltaire.redthread 2. Redeem your code: Open the app and scan the QR code on your ticket — or type your voucher code in. 3. For groups: Every participant installs the app on their own smartphone and redeems their own code from the ticket — one code per person. Once redeemed you have 14 days of access — the clock starts at redemption, not at booking. More information on our website: https://redthread.world We hope you enjoy your Red Thread tour!

Meeting and end point

What to know before you go

• Service animals allowed
• Public transportation options are available nearby
• Suitable for all physical fitness levels
• This activity can accommodate a maximum of 99 travelers.
• You will receive confirmation immediately when you book.

Travelers

Cancellation policy

For a full refund, cancel at least 24 hours before the scheduled departure time.

• From 1 days before : 100% refunded
• From 0 days before : 0% refunded

Product code: 5686150P182

Activity offered by Red Thread via Viator.