We do not recommend that you enter drains as it is against the law and dangerous.

The entrance to a drain will start at a waterway (canal, creek, river, lake, beach etc).

A Good drain will soon change shape. Some shapes you can find in Australian drains are mummy (coffin shaped), RCP (Round Concrete Pipe), arch, bowl, mushroom, balloon, square, rectangular, hallway, envelope, and many other unspecified shaped tunnels.

Better drains also have features such as stairways, waterfalls, slides, rooms, chambers, splits, junctions, shafts, old graffiti, stations, and grilles.

If you are lucky, the drain will be made out of a variety of different materials. The most common is concrete, but there are other materials used such as redbrick, bluestone, plastic, corrugated steel, sandstone, and even carved through natural rock.

Occasionally you will come across things that actually move such as bats, cats, cock-roaches, dogs, ducks, eels, ferrets, fish, frogs, mice, possums, rats, turtles, yabbies as well as other explorers!

After a while the tunnel will more then likely do one of two things; turn back into a creek, or shrink down into an awkward height.