In 1513 Spanish explorer Juan Ponce de León landed on the shores of Florida searching for the legendary Fountain of Youth. He never found it — but your virtual 10K will take you right through the heart of America's oldest city. St. Augustine was founded in 1565 and has been standing strong for more than 450 years. Wind through cobblestone streets past Castillo de San Marcos — the oldest masonry fort in the continental United States — along the stunning Matanzas Bay waterfront, and past the famous Fountain of Youth Archaeological Park where Ponce de León's dream lives on. 6.2 miles through five centuries of living history. Who knows — maybe those miles will make you feel a little younger too. Ponce de León never found his fountain. But you might just find yours at the finish line.