The start way point was to the South of Townsville and the finish way point was to the North of Townsville. Because Townsville is a controlled airport (ie there is someone with a bit of responsibility in the tower), we had to allow time for clearance delays both flying into and out of Townsville.
We allowed so much time that we landed at Ingham to the North of Townsville where we cooled our heels for about an hour and a half. Here we had to dodge the wallabies (small kangaroos) on landing and take off.
Jens got itchy to get back in the air (about 20 minutes too early), so we wound up doing lots of circling on the way to the finish point.
They spent the night in Townsville hoping to get a new alternator flown up from Brisbane and fitted in time to be able to rejoin us at Adel's Grove before end of daylight on the following day.
The tubes whose walls were made of slowly cooling lava are about 25m (75 foot) in diameter. You can actually walk into some of them during a guided tour:
We stayed in some refurbished railway carriages (sorry no photos) and tonight's entertainment was, appropriately, Murder on the Orient Express. We had to dress up as various characters with Jens being given Robert Julius Oppenheimer. Dirk was Thornton Powel-Smythe III, who turned out to be the murderer and discovered, in disgrace, committed suicide with a pop-gun.