The granite boulder encased beneath the 1921 neoclassical portico at 79 Water Street weighs approximately fifteen tons, yet the date carved into its surface—1620—was added in 1880, more than two and a half centuries after William Bradford and the Mayflower passengers came ashore. Plymouth Rock itself was never mentioned in any firsthand account written by the Pilgrims. The stone entered American mythology in 1741, when ninety-four-year-old Thomas Faunce identified it as the landing site his father had described, anchoring a legend that would shape the nation's origin story. Today the monument stands at the edge of Plymouth Harbor, where tides still lap the base of the portico and seabirds circle the pilings that once supported a busy wharf. The rock has been moved, broken, and reassembled multiple times—split in two during a 1774 relocation, reunited in 1880, and finally encased in protective granite and bronze. Visiting the site requires no ticket; the memorial park operates around the clock, though interpretive context lives a quarter-mile inland at Plimoth Patuxet Museums, a living history institution that reconstructs the 1627 English settlement and the Wampanoag homesite that predated it by thousands of years. The Mayflower II, a full-scale 1957 replica of the merchant vessel that carried 102 passengers across the Atlantic, is moored at State Pier and open for guided tours that detail the sixty-six-day crossing and the shipboard conditions that killed half the company before spring. A Boston to Plymouth Rock tour typically departs from downtown hotels or transit hubs and covers the forty-mile route in under an hour, entering Plymouth via Route 3A and passing cranberry bogs, kettle ponds, and the white clapboard villages that line Massachusetts Bay. Most itineraries include the rock itself, the Mayflower II, and either Plimoth Patuxet's English Village or the Wampanoag Homesite, where costumed interpreters demonstrate seventeenth-century agriculture, cooking, and maritime trades. Guides often extend the route north to Quincy, where the Adams National Historical Park preserves the birthplaces of John Adams and John Quincy Adams, linking the Pilgrim story to the Revolutionary generation that followed. The narrative tension between myth and material fact—between the carved date and the unverifiable landing—runs through every guided experience, making the pilgrimage less about venerating an artifact than about tracing the lines between memory, evidence, and national identity.