Needle Tower is a public artwork by American sculptor Kenneth Snelson located outside of the Hirshhorn Museum and Sculpture Garden in Washington, D.C., United States.

[3] According to Valerie Fletcher from the Institute for Human Centered Design, the “Needle Tower brings together advanced engineering methods with a very sophisticated aesthetic of abstraction".

According to Snelson: Tensegrity describes a closed structural system composed of a set of three or more elongate compression struts within a network of tension tendons, the combined parts mutually supportive in such a way that the struts do not touch one another, but press outwardly against nodal points in the tension network to form a firm, triangulated, prestressed, tension and compression unit.

In Needle Tower the six pointedness comes from the natural geometry of the three compression struts that make up each layer.

Sets of three alternate with left and right helical modules, adding up to six when viewed upwards from the base of the tower.