The earliest suspension bridges had no towers or piers, but these are present in the majority of larger suspension bridges.

The Suspension Bridge San Francisco's Golden Gate Bridge stands as a classic example of a suspension bridge. The first iron chain suspension bridge in the Western world was the Jacob's Creek Bridge (1801) in Westmoreland County, Pennsylvania, designed by inventor James Finley. By the late 1980s, three suspension bridges (the Golden Gate, in San Francisco, the Verrazano-Narrows, in New York City, and the Humber Bridge, near Hull, England) had main-span lengths of more than 4,000 feet (1,200 metres).
Of all the ways to get to a treehouse, suspension bridges are arguably the most fun. Finley's bridge was the first to incorporate all of the necessary components of a modern suspension bridge, including a suspended deck which hung by trusses. We're breaking down the techniques we use to build our bridges—join Charles Spitzack as he walks you through the design and build process in this video.
Modern steel alloys are considered capable of much greater spans. A living root bridge is a type of simple suspension bridge formed of living plant roots by tree shaping.They are common in the southern part of the Northeast Indian state of Meghalaya.They are handmade from the aerial roots of rubber fig trees (Ficus elastica) by the Khasi and Jaintia peoples of the mountainous terrain along the southern part of the Shillong Plateau. Regine Mahaux/Photodisc/ Getty Images As the name implies, suspension bridges, like the Golden Gate Bridge or Brooklyn Bridge, suspend the roadway by cables, ropes or chains from two tall towers. Built in 2004, the innovative and award-winning Treetops Adventure was designed to accommodate the continuous growth of the trees. The earliest suspension bridges had the cables anchored in the ground at either end of the bridge, but some modern suspension bridges anchor the cables to the ends of the bridge itself. Treetops Adventure, a series of seven suspension bridges attached to eight 30 ton, 250 year old Douglas-firs.