🚽➑️🧱🏞️

#sewer #waste water #toilet #plumbing #underground system #sanitation

πŸͺ²πŸͺ²οΏ½

#root network #underground system #plant roots

πŸ•³οΈπŸ”—πŸ—ΊοΈπŸ”¦

#cave network #interconnected caves #cave map #vast cave #underground system #cave navigation #spelunking map