A group of mudlarkers see what's hiding by a Philadelphia creek NPR | By Buffy Gorrilla Published February 4, 2026 at 2:58 PM PST Facebook Email Listen • 3:04 "Mudlarking" is the hobby of searching for keepsakes along muddy creek banks. An old marble is enough to get people outdoors for this pursuit best performed in the winter. Copyright 2026 NPR