Agua de la Tierra

Sun postcards compiled by Dick Seeger (1980) PNGs.

These are giant tunnels, mostly found in Brazil. Over 1,500 of them are documented.

It was originally assumed that they were dug by indigenous people, and many of them were repurposed into human shelters at some point, but we now believe they were built by prehistoric megafauna.

We know this because of distinct claw marks along the walls of the caverns, unlike anything humans have produced.

They come in a variety of sizes.

The smaller ones were probably dug by large armadillos, such as Holmesina.

The larger could have been dug by giant ground sloths like Glossotherium.

Thank you for reading, I just thought this was cool and wanted to share.

Sources and credits after the cut