You may have noticed in my last post some minecart track in the background, the day before I got griefed I had started building a mini-rollercoaster coming out of my tree house. This is going to be more of a picture post showing that off, so enjoy!
It starts up the tree
Then along here
Drops off the hill and goes into this hill where there is . . .
Lava! (When I first made this I had the track only one block above the lava, so it was flush) and when I tested it I set alight as I ran through. I then thought I would be clever and put myself out with water. I did this in the exit out of the cave, which goes uphill. The water ran back down into the hill and turned about half of the lava into obsidian. So I ended up having to mine all of that out for about 10 minutes before continuing
The setting sun over the cave exit
The track then runs under here and you can see the end on the right