  We study a 5d gravity theory with a warped metric and show that two N = 2
supersymmetric quantum-mechanical systems are hidden in the 4d spectrum. The
supersymmetry can be regarded as a remnant of higher-dimensional general
coordinate invariance and turns out to become a powerful tool to determine the
physical 4d spectrum and the allowed boundary conditions. Possible extensions
of the N = 2 supersymmetry are briefly discussed.

High Energy Physics - Theory;High Energy Physics - Phenomenology;Quantum Physics