31418111moundsPT2026-03-30 20:52:32UF31418112artificial moundsNDUF31418113moundNDUF31418114mounds, artificialNDBT31381922earthworksPTBT31402792man-made hypsographic featuresPTNT31443528cairnsPTNT31402268effigy moundsPTNT31443613burnt moundsPTNT31443620ceremonial moundsPTNT31443623conical moundsPTNT31443626platform moundsPTNT31443629cursus monumentsPTNT31443632farm moundsPTRT31417954burial moundsPT