I posted photos when we cleaned the graves in August on the anniversaries...If I get a chance, I'll post more photos...
Wikipedia has a summary of the festival in different countries...
Alas, my stepson is Protestant and not into these things...
And HERE is a link to the precautions against terrorism...
Personally, the real dangers are the usual: car wrecks, dengue fever, food poisoning, and diarrhea...