Getting to Marum could be compared to a reverse climbing of Everest. If the weather is bad, the whole trip into the raging, most active and most dangerous volcano on Earth can be quite challenging - tremendous heat from the lava, descending and ascending 400 meters of near vertical, loose rock face, acid rain so strong that it could have come from a car battery, and a variety of other craziness. Plus, one slip and you are history.
After abseiling down into the crater of Marum volcano, the crew encountered an amazing sight of Marum's boiling lava lake. Coming within 30 meters of the lava lake down a watercourse, one can stand the heat for only 6 seconds but with Fire Brigade breathing apparatus and heat proof proximity suit it was possible to stand on the very edge and view the incredible show for over 40 minutes. Check it out.