Komodo dragons are not poisonous, but their mouths host colonies of bacterium that can cause gangrene and horrible infections immediately. From 1974-2012, there have been 24 Komodo dragon attacks on humans on Komodo Island, 5 of those attacks ended with the victim dying.
Tijuana
Tijuana is a modern tourist capital for young folks and partygoers, but recently there has been an influx of cartel members in the small Mexican city. Although it is rare, some American tourists have reported getting captured and interrogated by cartel members, all of which were released immediately afterward unharmed.