■ Construction was a bear: The roads are 16 feet wide with three layers of rock underneath. Construction included stone culverts, arched bridges, and wide ditches, and the work stretched from 1913 to 1940.
■ Rockefeller was famous for his attention to detail on the project — he reportedly knew the names of all of his laborers and was consulted on even the minutest decisions.
■ Large hunks of granite line the roads as guardrails. They’re officially called “coping stones” but nicknamed “Rockefeller’s teeth.”
■ The Friends of Acadia organization has an endowment devoted to carriage road maintenance — it gives the park some $200,000 annually just for carriage road upkeep.
Photograph by Mark Fleming