Double Arch, at 112 feet, is the tallest arch in the park. At 144 feet in length, it's also the second-longest arch in the park. Luckily, this natural wonder is easy to reach. The half-mile trail ...

For many years, the Garabit Viaduct remained the tallest bridge in the world ... and later with the framework of the Statue of Liberty and Paris' Eiffel Tower, earned him the nickname "magician ...