November 21, 2017

Wood Stain


Sarah Lawrence College, Bronxville, New York, 2009.


Photo by I. Peterson

November 20, 2017

November 18, 2017

White Yellow Black


Building decoration, Toronto, Ontario, 2006.

Photo by I. Peterson

November 17, 2017

Golden Triangle


Banner with logo of the Golden Triangle Business Improvement District: Moebius strip,or not?. Washington, D.C., 2017.

See also "Impossible Logo."

Photo by I. Peterson

November 16, 2017

Gold Tree


Gunston Hall, Mason Neck, Virginia, 1982.

Photo by I. Peterson

November 15, 2017

Mace Moebius


Mace Moebius by Charles O. Perry. Crystal City, Virginia, 2000.

See also "Mobius Continuum" and "Moebius Eclipse." 

Photo by I. Peterson

November 14, 2017

Ear on the Sky


Green Bank, West Virginia, 1977.

Photo by I.Peterson

November 12, 2017

Hypercube Model


Constructed from seven square cylinders, each made from a strip of four squares, this model of an unfolded hypercube, created by Thomas F. Banchoff, collapses into a flat, two-dimensional configuration.


Photos by I. Peterson

November 11, 2017

Crinkled Torus


Crinkled torus by William T. Webber.


A properly creased, rectangular sheet can be turned into a crinkled torus shape.


Photos by I. Peterson; model by William T. Webber.

November 10, 2017

Shoreline Reflection


Winona, Minnesota, 2008.


Photos by I. Peterson


November 9, 2017

Wooster Autumn


Kauke Hall. College of Wooster, Wooster, Ohio, 2009.

Photo by I. Peterson

November 7, 2017

Potomac View


View of the Potomac River from the lawn of George Washington's Mount Vernon. Mount Vernon, Virginia, 1981.

Photo by I. Peterson

November 5, 2017

Silver Leaves


Bloor Parkette (southeast corner of Bloor Street West and Spadina Avenue), Toronto, Ontario, 2009.


See also "Leaf on Leaf."

Photos by I. Peterson

November 4, 2017

November 3, 2017

November 2, 2017

Diamond Tree


Geometric diamond grid pattern overlaid on fractal-like tree branches. Ottawa, Ontario, 1974.

Photo by I. Peterson

November 1, 2017

Lake Firs


Northwestern Ontario, 1977.

Photo by I. Peterson

October 31, 2017

Sculpted Ceiling


voltaDom by Skylar Tibbits. Building passageway, Massachusetts Institute of Technology, Cambridge, Massachusetts, 2009.

Photo by I. Peterson

October 30, 2017

Cape Breton Highway


Coastal highway. Cape Breton Island, Nova Scotia, 1974.

Photo by I. Peterson

October 29, 2017

Layered Stack


Carleton College, Northfield, Minnesota, 2010.

Photo by I. Peterson

October 28, 2017

Circle II


Circle II by David SmithEast Building, National Gallery of Art, Washington, D.C., 2017.

See also "Circles Series."

Photo by I. Peterson

October 27, 2017

Washington Square Arch


Washington Square Arch, Greenwich Village. New York, New York, 2014.

Photo by I. Peterson

October 26, 2017

Reflection Shimmer


Cacapon Resort State Park, Berkeley Springs, West Virginia, 2017.


Photos by I. Peterson

October 25, 2017

Cosmic Void


Cosmos by Seymour Lipton. Sydney and Walda Besthoff Sculpture Garden, New Orleans Museum of Art, New Orleans, Louisiana, 2010.

See also "Blooming Bird."

Photo by I. Peterson

October 24, 2017

Curves on Curves


Plaster model of a mathematical surface, inscribed with curves. Mathematics Department, University of Nebraska, Lincoln, Nebraska, 2012.


Photo by I. Peterson

October 23, 2017

October 22, 2017

Bridge to Nowhere


Near Columbia, Missouri, 1980.

Photo by I. Peterson

October 21, 2017

Table Sculpture


Table Sculpture: Can't Recall A Time by John Hock. Western Michigan University, Kalamazoo, Michigan, 2011.


Photos by I. Peterson

October 20, 2017

Shell Fragment


Eroded shell fragment. Assateague Island, Maryland, 1981.

Photo by I. Peterson

October 19, 2017

Grain Transport


Brandon, Manitoba, 1976.


Photos by I. Peterson


October 18, 2017

Capitol Arcs and Arches


Wisconsin State Capitol, Madison, Wisconsin, 2012.

Photo by I. Peterson

October 17, 2017

Laws of Motion


Newton's three laws of motion, as stated in Latin in his Philosophiae naturalis principia mathematica.

Reproduced from the collections of the Library of Congress

October 16, 2017

Dock Reflection


Portsmouth Harbor, Kingston, Ontario, 1974.

Photo by I. Peterson

October 15, 2017

Drain Cover


Milan, Italy, 2010.

Photo by I. Peterson

October 14, 2017

Carved Ceiling


Jain Temple, Ranakpur, India, 2010.

Photo by I. Peterson

October 13, 2017

October 12, 2017