Perhaps the most obscure Watergate landmark is the parking lot at the Key Bridge Marriott. In April 1972 (before the famed June 17 break-in), White House aide Alexander Butterfield used the Key Bridge Marriott parking lot to hand off $350,000 in cash—in $50 and $100 bills from a Nixon campaign "reserve fund"—to Leonard Lilly, who was to make deliveries upon direction.