These were unique but traditional bridges. The Hubby and I really loved them and looked for them all over the Mountain region of New Hampshire.
Most of the bridges are built with arches and a long truss system. Like the one shown below.
Hurricane Irene went through and dumped all of its rain right onto Vermont and New Hampshire causing all kinds of flooding and 28 bridges were either destroyed or damaged greatly.
One called Turkey Jim's that we looked for was totally gone.
Anyway, the covered bridges are very cool and we were lucky to be able to go see them.