Two Dollar Bluff, prominently featured on the U.S. Geodetic Map of 1887, served as a navigational aid for ships on the Indian River. Located on property owned by settler and citrus grower A.B. Michael, the bluff was an Ais Indian midden and later became the site of the Michael family dock. By 1927, archeological materials in the midden, including shell, pottery shards, and bones, were nearly gone after being taken for use as road material. The dock was then replaced by a narrow wooden bridge with a metal swing span crossing to the community of Orchid. That bridge carried Indian River citrus from Orchid Island groves to the railroad and opened the northern part of Indian River County to tourism and land development. During World War II, access was limited to island residents, and the bridge tender checked the credentials of those who crossed. In 1970, the old bridge was replaced with a causeway and a high-arch bridge over the main channel and named the Wabasso Bridge. In 2020, it was renamed the A.B. Michael Bridge. It leads directly to Treasure Coast beaches where remnants of the 1715 Spanish Silver Fleet are still found.