La Jolla Shore

La Jolla, California, 2016.

Photo by I. Peterson

Tidal Swings

Tide gauges. Brannan Street Wharf, San Francisco, California, 2016.

The columns nestled within the red tubes rise and fall with the tide. Counting the stripes gives the height of the tide in feet.

See also "Tide Cycles."

Photos by I. Peterson

Tilted Donut

Tilted Donut 5 by Fletcher Benton. Corner of El Camino Real and Page Mill Road, Palo Alto, California, 2016.

Photos by I. Peterson

Airport Helical Toroid

A helix wrapped into a torus (ceiling detail). Concourse B, Denver International Airport, Denver, Colorado, 2016.

Photos by I. Peterson

Buckyball Lights

Buckyball by Leo Villareal. Exploratorium, San Francisco, California, 2016.

Photos by I. Peterson

Tiled Pentagons

Roof, Campbell United Methodist Church. Campbell, California, 2016.

For more pentagonal tilings, see "Tiling with Pentagons," "Pentagons for Floors," and "Splitting a Hexagon."

Photo by I. Peterson

Circuit Egg

Digital DNA by Adriana Varella and Nilton Maltz. Lytton Plaza, Palo Alto, California, 2016.

Photos by I. Peterson

Reuleaux Triangle on the Street

Reuleaux triangle. Third Street, San Francisco, California, 2016.

For more about Reuleaux triangles, see "Manhole Cover Geometry," "Drilling a Square Hole," and "Geometreks in Boston."

Photo by I. Peterson

Waterfront Arrow

Cupid's Span by Claes Oldenburg and Coosje van Bruggen. Embarcadero, San Francisco, California, 2016.

Photo by I. Peterson

Tail Light Swarm

Autoplast I: Tail Light Swarm by Amy Landesberg. Rental Car Center, San Diego International Airport, San Diego, California, 2016.

Photos by I. Peterson

Power Line Parallels

Austin, Texas, 2010.

Photo by I. Peterson

Chaos and Order in Beads

Chaos and Order by Gwen Fisher. Displayed at Gathering 4 Gardner 10, Atlanta, Georgia, 2012.

For more, see "Symmetries of Beaded Beads."

Photo by I. Peterson

Squares and Stripes

Wall Drawing No. 681 C by Sol LeWitt. National Gallery of Art, Washington, D.C., 2008.

"A wall divided vertically into four equal squares separated and bordered by black bands. Within each square, bands in one of four directions, each with color ink washes superimposed."

For other artworks by Sol LeWitt, see "Incomplete Open Cubes," "Puzzling Lines," "LeWitt's Pyramid," "LeWitt's Complex Form," and "Thirteen Geometric Shapes."

Photos by I. Peterson

Folded Disk

Untitled sculpture by Ellsworth Kelly. Hirshhorn Museum and Sculpture Garden, 2010.

See also "Stele II."

Photo by I. Peterson

Mirror Bean

Cloud Gate by Anish Kapoor. Millennium Park, Chicago, 2010.

See also "Cloud Gate."

Photo by I. Peterson

Johns Target

Target by Jasper Johns. National Gallery of Art, Washington, D.C., 1999.

Photo by I. Peterson

Giant Zome Polytope

Giant polytope model constructed from Zometool components. Bridges: Mathematical Connections in Art, Music, and Science, Southwestern College, Winfield, Kansas, 2001.

Photo by I. Peterson

Steel Nautilus

Nautilus by Charles Ginnever. Minneapolis Sculpture Garden, Walker Art Center, Minneapolis, Minnesota, 2010.

See also "Stable Positions."

Photos by I. Peterson

Spiral Moebius

Spiral Moebius by Nat Friedman. Exhibition of Mathematical Art, Joint Mathematics Meetings, Washington, D.C., 2009.

Photo by I. Peterson

Main Street Tensegrity

Sagg Main Street by Kenneth Snelson. Philadelphia, 2000.

Photo by I. Peterson

Barn Studio

Mathematician and sculptor Helaman Ferguson transformed a barn dating back more than 150 years into a spacious though somewhat drafty sculpture studio. Bowie, Maryland, 1999.

Photos by I. Peterson

Intersecting Tetrahedra with a Twist

Flamex Beta by Bathsheba Grossman.

Photo by I. Peterson

Costa Surface in Bronze

Costa minimal surface by Brent Collins. Bridges: Mathematical Connections in Art, Music, and Science, Soujthwestern College, Winfield, Kansas, 2001.

Photo by I. Peterson

Dodecahedral Dinner

The Sacrament of the Last Supper by Salvador Dali. National Gallery of Art, Washington, D.C., 2014.

Photo by I. Peterson

Black Planes

Four and Six Planes Escarpe by Alexander Calder. New Orleans Museum of Art, New Orleans, Louisiana, 2010.

Photo I. Peterson

Meditations on a Curved Surface

Meditations on f(x,y)= x²/2 + xy/2 - y⁴/8 by Richard Werner. Exhibition of Mathematical Art, Joint Mathematics Meetings, San Francisco, 2010.

Photo by I. Peterson

Main Channel Bridge

The cantilevered Main Channel Bridge spans the Mississippi River, linking Winona, Minnesota, and Latsch Island. Winona, Minnesota, 2008.

Photos by I. Peterson

Rock Swirls

The Botanical Gardens at Asheville, Asheville, North Carolina, 2016.

Photo by I. Peterson

Black Eyes

Rudbeckia. The Botanical Gardens at Asheville, Asheville, North Carolina, 2016.

Photo by I. Peterson

A Fractional Limit

Fancy Gap Cabins and Campground. Fancy Gap, Virginia, 2016.

Photo by I. Peterson