4 ms·

Here is a place (San Agustín sump) that takes 3 weeks to get to from the cave entrance: https://en.wikipedia.org/wiki/Sistema_Huautla https://en.wikipedia.org/w

Here is a place (San Agustín sump) that takes 3 weeks to get to from the cave entrance: https://en.wikipedia.org/wiki/Sistema_Huautla https://en.wikipedia.org/wiki/Sistema_Huautla

m463 6y ago
> In 1994, during a 135-day expedition of 44 people ... wow