Does the "Pico Cave" actually exist?

I've been wondering if the "Pico Cave" still exists, or if it ever existed at all.

Source for those who don't know: https://www.youtube.com/watch?v=J6dAvp2xqEI&t=58s

One of the Spectrum posts about it: https://robertsspaceindustries.com/spectrum/community/SC/forum/3/thread/pico-cave-2