Maclean's Mountain is a six metre high, eighteen metres long, stainless steel structure that also "has a 'canyon' that visitors wander through and peepholes that reveal highly magnified images of minerals. Sounds from deep within the Earth echo through the sculpture as visitors walk by."
Teh sculpture was inspired, of course, by the work of Natural History Museum scientists, and their attempts to understand the mineral, molecular and crystal structure of the Earth. It also looks cool.
There are "accompanying photographic images" and sketches etc displayed inside the Museum, or if you're really interested to know more you can get down to the Darwin Centre this afternoon at 2:30, when Adam Rosenthal will be interviewing MacLean about her work.