Netherlands, Bussum, Spanderswoud, Oct. 2012
I couldn't find this specimen in my mushroom guides and on internet. It is a relatively large fungus with a cap diameter of about 10 cm (upper one).
I asked people of the Royal Dutch Flora Association, but they told me that without information on the root system and a taste sample it was impossible to tell! The only information they could give was that they belong to the fungal order Agaricales which means, according to my guides, gilled mushrooms.
After an intensive search I finally found at
http://www.mykoweb.com/CAF/species/Gymnopilus_spectabilis.html an image that resembles very well the above photo. So it might well be the Gymnopilus junonius - Laughing gym (or Laughing Jim, or Spectacular rustgill) - Prachtvlamhoed