Mechanical Spider Cars of the South

Imagine, if you will, a reality where dinosaurs were not wiped out by a terrible asteroid, but instead continued to prosper and evolve. After millions of years, one species got real smart, real fast, and then turned this world  - and space itself! - into their Kingdom, and all other creatures mere subordinates. Continue imagining, if you're still willing, that at the heights of their glory and power they became arrogant and crass, stupid drunk on their power, and they wiped themselves out. Alas!

Here's some ruins from their glorious but now departed culture. They liked mechanical spiders, according to scholars.

Also too: Nice pine trees!