Trash can, mail drop box -- I wasn't sure what it was, honestly, because it just looked, well, blobby, to be honest. An Americanism in any case, it seems!

Fire hydrants in California and everywhere I've been except for Chicago are usually taller than the one depicted in the comic panel, perhaps a third to half again as tall. For some reason, Chicago uses shorter hydrants that are quite aggravating because it's hard to see them when driving by looking for a parking spot (it's illegal to park in front of a hydrant and block it).