Watch: Inside the World’s Longest Sea Caves | Expedition Raw

yeah I actually went to New Zealand to
study the other side of the island but
satisfy my curiosity I start exploring
this coastline and that turned out to be
the day that I actually discovered the
longest sea cave in the world
on this coastline that’s only about a
mile long it contains six of the ten
longest sea caves in the world including
the two longest it’s really exciting you
get to an entrance and you really have
no idea what’s going to happen pushing
down that next passage
maybe the swell is sort of cresting up
to the ceiling and you might have to
hold your breath just to go through to
the next part and you don’t know if
that’s the end of the cave or if it’s
going to open up into a big room full of
beautiful formations or interesting sea
life these caves have some really
impressive cave formations in them that
as they slowly drip they record climate
through time just like tree rings – it’s
one small piece of the global climate
puzzle
then we can start looking at things like
what’s the erosion rate because the way
sea caves form is by eroding coastlines
we’re mapping these caves using both
traditional 2d cave survey and also
newer three-dimensional surveying based
on photography we can get texture on the
cave walls of all these features in
addition to the shape and morphology of
the cave but we still have a lot of work
to do because with caves you truly don’t
know what you’re getting yourself into
until you get yourself into them it’s
true exploration