The Wayback Machine - https://web.archive.org/web/20100611203942/http://www.math.cuhk.edu.hk:80/exhibit/

Mathematical Object Exhibit

$Cube$ Cube	$Sphere$ Sphere
$Paraboloid$ Paraboloid	$Cone$ Cone
$Ellipsoid$ Ellipsoid	$Octahedron$ Octahedron
$Cylinder$ A Sphere in a Cylinder	$Catenoid$ Catenoid
$Enneper$ Enneper	$Helicoid$ Helicoid
$Hennberg$ Henneberg	$Cruller$ Cruller
$Spherical Harmonics$ Spherical Harmonic	$Klein Bottle$ Klein Bottle
$Mobius Strip$ Mobius Strip	$Another Mobius Strip$ Another View of Mobius Strip
$Knot$ Trefoil Knot	$Torus$ Trefoil Knot again
$Knot$ More on Knots	$Torus$ Knots
$Knot$ Knots	$Torus$ And Knots
$Fractal$ Fractal	$Weierstrass Function$ Function that is continuous everywhere but no where differentable