Natural bridges

Land Bridges: Ancient Environments, Plant Migrations, and New World Connections

Alan Graham

Windstone: natural arches, bridges, and other openings

David Muench ; essay by Ruth Rudner

The arches of Arches National Park.

by Dale J. Stevens and J. Edward McCarrick ; field work and documentation support, Chris Moore.

Junior Rancher booklet

United States. National Park Service

Arches

by David W. Johnson ; edited by Mary Lu Moore.

Natural bridges of Tennessee

by James X. Corgan and John T. Parks.

Rainbows of rock, tables of stone: the natural arches and pillars of Ohio

by Timothy A. Snyder.

Nature's bridges and arches

by Robert H. Vreeland.

Windstone: Natural Arches, Bridges, and Other Openings

David Muench

Canyon Country arches & bridges, and other natural rock openings