# level/contour curves in 3D

Is there a way to graph level curves of a function $f(x,y)$ in 3D at their respective heights? (Much like **contourplot3d** in Maple.) Thanks.

To make things clearer: what I'd like to see is a 3D plot with level curves (not surfaces). We start with a function of 2 variables (not three) and I'd like to see the 'exploded' contour plot so that the level curves are graphed at their respective z-altitudes. Makes sense?