Charles Ray Walker, a 59-year-old homeless man, has turned a grim patch of land off the L.A. River in Boyle Heights into an unlikely exhibition of his tastes, quirks, obsessions and comic observations.

But few have done so with Walker's flair.

His meticulously arranged found objects suggest a junkyard designed by Santa's elves or a post-apocalyptic Disneyland. There's even a faint echo of large-scale specimens of over-the-top folk art, such as Daniel Van Meter's Tower of Wooden Pallets in Sherman Oaks or Simon Rodia's world-famous Watts Towers. Walker's raw materials are discards of every description: sea shells, marbles, SpongeBob figures, a Pillsbury doughboy, an Osama bin Laden puppet in camouflage, the Grim Reaper.

Posters, traffic signs ("No Smoking — Stop Your Motor," says one) and other detritus contribute to the surreal atmosphere.