Can anyone guess what this small hole filled with water, in the center of a fort built in the 1600s on an island just off the coast of Colombia was used for?

Cohost of /gmfarcaster, a live stream Farcaster news show.  Engineer. Mom x 3. I love to share the wonder and beauty of daily life.

Zero idea; yet evaporation rate could be one piece of info derived from standing water and dew points inferred.

Cohost /gmfarcaster livestream Farcaster news show 🎙️💬 Founder Tenger Ways, bringing joy into work with DevOps practices 🤗 mom x 3 💗

Answer:

Small narrow tunnels shot outward and connected to the sea. As boats approached they could tell which direction the boats were coming from by observing the water’s movement in the hole.

The local guides called it a sefon, and we made a joke it was a sea-phone, because it was a communication device for the sea. 

Pretty neat engineering design.

There were some good guesses in the replies.

Here’s the answer and here’s 250 $degen for taking a guess 🙏

Growing veggies for the fine folks of Southeastern Massachusetts, w/ a focus on nutrient quality. Always interested in the evolution of digital payments.  🎩 

Here’s the answer and here’s 250 $degen for taking a guess 🙏 

https://warpcast.com/adrienne/0xf90fc5b6