The National Mall is a neglected “disgrace” that demands at least $500 million in upgrades to restore, preserve and perhaps expand for future generations, a U.S. House panel was told Tuesday.

“There’s no great national park that suffers from this kind of neglect,” D.C. Del. Eleanor Holmes Norton told the National Resources Committee subcommittee on national parks, forests and public lands, which held a hearing on the Mall’s future.