Take a torch and you'll discover a fascinating world with colourful moths, spiders, delicate moisture-loving ferns, and a colony of insect-eating microbats.
It is an informal garden where shade and moisture-loving plants, including primulas, astilbes and hostas, grow alongside pools, streams and a constantly flowing fountain.
If you were planting crocus or narcissi like this in heavy soil, you'd add a little grit or spent compost to the hole, but not with these moisture-loving fritillaries.
A permanently damp atmosphere is created through a combination of numerous waterfalls and good tree coverage, and allows an unusually rich variety of moisture-loving mosses, plants and trees to thrive.