HitchBOT has traveled Canada and Germany, but Philadelphia proved to be its toughest challenge.

The hitchhiking robot from Port Credit, Ontario, was vandalized Friday night in Philadelphia.

Per hitchbot.me:

hitchBOT's trip came to an end last night in Philadelphia after having spent a little over two weeks hitchhiking and visiting sites in Boston, Salem, Gloucester, Marblehead, and New York City. Unfortunately, hitchBOT was vandalized overnight in Philadelphia; sometimes bad things happen to good robots.  We know that many of hitchBOT's fans will be disappointed, but we want them to be assured that this great experiment is not over. For now we will focus on the question "what can be learned from this?" and explore future adventures for robots and humans.

The news of the vandalism brought the usual Twitter attention.

There was outrage for Philly:

But there was also an offer of help:

HitchBOT's U.S. journey started in Salem, Massachusetts, and included stops at Fenway Park and New York City. Alas, the final destination, San Francisco, is out of sight.

But hitchBOT enjoyed its time with family and friends:

Here's to hoping hitchBOT can make a return -- in health, and to Philadelphia.