forced perspective


noun

the use of objects or images that are larger or smaller than they should be, to suggest that they are nearer or further away than they really are
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012