A whole world exists, from burrowing animals to rats in sewers, to caves and burial chambers. Take a tour of The Street Beneath My Feet to learn of tunnels & pipes, burrows and rock. Also read Underland: A Deep Time Journey.
Caves are natural voids that are large enough for humans to enter. Caused by eroded rock, some are in the Yorkshire Dales (limestone) and Cumbria’s Ease Gill (over 40 miles long). In Hastings, St Clements Caves tell the story of smuggling.
Burial chambers (catacombs) are passageways used by religious people, one in Paris has 6 million people buried in a tunnel network. It’s believed there are over 1000 bodies beneath Aldgate East tube station: victims of the Bubonic Plague which killed 100,000 people. Other burial chambers have been found on Dartmoor and Southend (between a pub & an ALDI supermarket, suspected from the 6th century).
Animal homes. From rabbits to water voles, many animals live underground. Badgers have suffered culls due to bad science – see how to stop TB in badgers & cattle. Foxes are a good part of nature (rats and rabbits are the fox’s natural diet, so could take care of things, if we had not built over his natural home in recent decades). No-dig gardening helps earthworms.
Food. With less natural space available, London’s Growing Underground grows sustainable food 33 feet underground at Clapham, using LED technology hydro-phonic gardening systems, unaffected by weather. From crop to fork in 4 hours.
Ants usually disappear, when weather cools. They like protein if they have eggs, but mostly sweet (do don’t leave cola, sandwiches, cake crumbs nearby). Anthills aerate the soil and provide food for birds (by protecting caterpillars, due to sticky honeydew they secrete). Spraying even natural solutions will kill them. Some say mint deters, others say not. Keep herbs away from pets, mint can upset cats in particular – see more pet-toxic herbs to avoid).