What is the very southernmost part of Louisiana?
Venice, or Orchard (part of Venice) by road. The southernmost
inhabitated part of LA is Port Eads, or South Pass, only reachable
by boat or helicopter. The marina was destroyed in Katrina, but the
lighthouse is still there, albeit leaning to one side. $12 was just
secured from the Feds to rebuild it, though. So it will be back.
The old Harbor Master, Jeffery Scarabin, and one other person,
attempted to ride out Katrina there, and were never heard from
again. There's Pilottown, which used to be call La Balize, also
only accessable by boat or helicopter. The buildings there
temporarily house ship pilots, but very few people, less than 20,
are there today. It used to be a few miles downriver, but was
destroyed in the 19th century. There are also a few small rigs and
platforms for pilots, weather stations, and oil drilling along the
mouth of the Mississippi.