At http://siberiantimes.com/science/casestudy/features/f0135-first-glimpse-… … this excellent web site has lots of images to go with its science stories – and we get to see inside the cave.
The Denisova cave is situated in the Altai mountains and looks across a pass between two valleys. It is a hive of archaeological activity at the moment. It came to fame with the discovery of a finger bone in 2008 belonging to a new species of early human, the Denisovans. The University of Novasibirsk is in charge of the archaeology but they have been working with Oxford University (dating methodologies and DNA analysis).
One interesting point made is that ice sheets did not extend to the Altai in the last Ice Age – though they may have formed in western Siberia. This meant the region was perfect for human hunters to exploit. When the Denisovans were extent, over 200,000 years ago, oak woodland and hornbeam thrived, the kind of tree that now grow in English lowland forests.