Fountain Channels

Sheldahl Anniversary Fountain by Raymond L. Jacobson. Bridge Square, Northfield, Minnesota, 2010.

Photos by I. Peterson

Earl Hall

Earl Hall, Columbia University, New York City, 2017.

Photo by I. Peterson

Three-Way Pieces

Three-Way Piece No. 1: Points by Henry Moore. Revson Plaza, Columbia University, New York City, 2017.

Three-Way Piece No. 2 (The Archer) by Henry Moore. City Hall, Toronto, Ontario, 1999.

See also "Reclining Figure."

Photos by I. Peterson

Columbia Math

Expression of architectural symmetry at the mathematics building, spoiled only by an air conditioner and unruly shrubs. Columbia University, New York City, 2017.

Photo by I. Peterson

Taming Pegasus

Bellerophon Taming Pegasus by Jacques Lipchitz. Jerome Greene Hall, Columbia University, New York City, 2017.

Photo by I. Peterson

Deep Thought

The Thinker by Auguste Rodin. Philosophy Hall, Columbia University, New York City, 2017.

Photo by I. Peterson

Life Force

Life Force by David Bakalar. Revson Plaza, Columbia University, New York City, 2017.

Photo by I. Peterson

Cross and Circle

Wall decoration (Celtic wheel cross). Union Theological Seminary, New York City, 2017.

Photo by I. Peterson

Window Gold

Brown Memorial Tower, Union Theological Seminary, New York City, 2017.

Photo by I. Peterson

Cloaked Owl

Alma Mater (detail) by Daniel Chester French. Columbia University, New York City, 2017.

Photos by I. Peterson

Reclining Figure

Reclining Figure by Henry Moore. Columbia University, New York City, 2017.

For other Henry Moore sculptures, see "Knife Edge Guard" and "Henry Moore at MIT." 

Photo by I. Peterson

Zigs and Zags

Northwest Corner Building. Columbia University, New York City, 2017.

Photos by I. Peterson

Half-Cylinder Sundial

Camp Columbia Sundial. Columbia University, New York City, 2017.

For other sundials, see "Como Sundial," "Spherical Sundial," and "Giant Sundial."

Photo by I. Peterson

Columbia Curl

The Curl by Clement Meadmore. Columbia University, New York City, 2017.

For more on Clement Meadmore, see "Bending a Square Prism."

Photos by I. Peterson

Gallery Cutouts

East Building skyline, National Gallery of Art, Washington, D.C., 2008.

See also "Splitting a Trapezoid" and "An Irresistible Edge."

Photo by I. Peterson

Polyhedral Lamp

Polyhedral lamp by Hans Schepker. On display at the Joint Mathematics Meetings, New Orleans, Louisiana, 2007.

See also "Polyhedron with a Hole."

Photo by I. Peterson

City Shades

Hotel room view. New York City, 2014.

Photo by I. Peterson

Exploratorium Pi

Pi plaque. Exploratorium, San Francisco, California, 2014.

For more pi places, see "Pizza, Beer, and Pi," Portland Pi," "Square Root of Pi," "Pi Doors," "DC Pi," "Pi Places," "Sliding Pi in Toronto," "Segments of Circles, Sections of Spheres," and "Galileo's Vision in Missouri."

Photo by I. Peterson

Kings Landing

Kings Landing Historical Settlement, Prince William, New Brunswick, 1974.

Photo by I. Peterson

Gaussian Primes

Representation of Gaussian primes. Mathematics Department, University of Nebraska, Lincoln, Nebraska, 2012.

Photo by I. Peterson

Jellyfish Sand

Jellyfish. Sandy Point State Park, Maryland, 1985.

Photo by I. Peterson

Stair Twist

Revolutions by Michel de Broin. Papineau subway station, Montreal, Quebec, 2010.

See "Knotted Staircase."

Photo by I. Peterson

Silo and Pond

Pond reflection of an abandoned silo. Rock Bridge Memorial State Park, Missouri, 1980.

Photo by I. Peterson

Squirrel Food

Campus squirrel. Kalamazoo College, Kalamazoo, Michigan, 2011.

Photo by I. Peterson

Observatory on Ice

Newton Memorial Observatory. Allegheny College, Meadville, Pennsylvania, 2010.

Photo by I. Peterson

Beach Clutter

Ocean City, Maryland, 1979.

Photo by I. Peterson

Lumber Ends

Railway yard lumber stack. Brandon, Manitoba, 1976.

Photo by I. Peterson

Intersecting Arcs

Foyer artwork. Van Vleck Hall, University of Wisconsin, Madison, Wisconsin, 2012.

See also "Geometreks in Madison I: Van Vleck Hall."

Photo by I. Peterson

Lexington Keyhole

Keyhole sculpture. Lexington, Kentucky, 2011.

For another example of a keyhole sculpture, see "Granite Keyhole." 

Photos by I. Peterson

Stretched Time

Outdoor wall mural. Cordell Avenue, Bethesda,Maryland, 2017.

Photos by I. Peterson

Derelict Boat

Abandoned boat. Kingston, Ontario, 1975.

Photo by I. Peterson