The World of Escher
The web site to explore the great M.C. Escher artworks. Each image has commentary and a zoom mode.
http://www.worldofescher.com/

Geometric Sculpture of George W. Hart
The geometric sculpture of George W. Hart displays the beauty of mathematical forms in various media.
http://www.georgehart.com/sculpture/sculpture.html

Tips and Tricks to Gothic Geometry
Full explanatory diagrams for constructing your own rose window, ogee arch, and trifoil tracery.
http://www.newyorkcarver.com/geometry/geometry.htm

Geometry Gallery
Spatial designs by Vedder Wright.
http://world.std.com/~vwright/gallery.shtml

Synergetic Geometry
Richard Hawkins' digital archive.
http://www.newciv.org/Synergetic_Geometry/

Islamic and Geometric Art
A personal journey through aspects of geometric art with particular reference to Islamic design. Includes full descriptions and methods for building often complex structures.
http://www.geometricdesign.co.uk/

GeomeTricks
Explore complex geometric structures based upon the 'basic joint'; an interconnectable joint composed of four intersecting sets of three triangular prisms. Includes assembly instructions, sculpture photographs and interactive virtual 3D models.
http://www.geometricks.com/

Ken Snelson
The art and tensegrity sculptures of Ken Snelson.
http://www.grunch.net/snelson/

Polyhedra and other Interesting Structures
Home made polyhedra and other constructions with interesting structural properties, specifically tension and rigidity.
http://www.pendred.net/

Stewart Dickson's Art Page
Includes image galleries of 3-D images, a paper on tactile geometry, resume, virtual reality project and diversions.
http://emsh.calarts.edu/~mathart/

Art Geometry and Abstract Culture
Computer Graphics, Art, Math, Geometry, and Abstract Sculpture are closely related. These activities are trying to transcend the boundaries between the fields. With images of models and sculptures.
http://www.cs.berkeley.edu/~sequin/ART/

Tom Lechner's Sculptures
Polyhedral sculptures for sale. Also includes his memoirs of making polyhedral models, math references, and his art school thesis.
http://www.re.org/tom/sculptures/sculptures.html

Un-disassemble-able Object by Jack Snoeyink
A sculpture representing research results on the number of hands that a robot would need to assemble collections of simple geometric objects.
http://www.cs.ubc.ca/nest/imager/contributions/snoeyink/sculpt.html

Math Art Gallery
Knots, surfaces and fractals.
http://www.math.ru.nl/knopen/art_gallery.html

Polynomiography
Features images based on polynomial equations. Includes online drawing software, along with user's tutorial.
http://www.polynomiography.com/