Printed it in Elegoo PLA. I messed up the first attempt (I was trying to run a marble down it while it was still printing, resulting in a layer shift), but the second time it came out great. Love how there is no need for supports whatsoever. Would recommend.
Elegoo red pla
Works really well
One of the arches broke but still printed perfectly some how
Very impressive! This was featured on The Next Layer YouTube channel and I just had to have it...
Printed here with Overture Sandstone and White Rock, with a touch of iSanmate Ebony Wood.