This looks like a real volcano, but it's actually one of Matthew Albanese's finely detailed models made out of tile grout, cotton, phosphorous ink, and lit from within by 6-60 watt light bulbs. Other realistic shots include the surface of Mars from paprika, and a lake vista using a common glass patio tabletop. In his own words:
My work involves the construction of small-scale meticulously detailed models using various materials and objects to create emotive landscapes. Every aspect from the construction to the lighting of the final model is painstakingly pre-planned using methods which force the viewers perspective when photographed from a specific angle. Using a mixture of photographic techniques such as scale, depth of field, white balance and lighting I am able to drastically alter the appearance of my materials.
Link (via C-Monster)