Drive a vehicle on the autobahn/freeway (motorway) in Germany. No speed limit on most parts
I like your style. Personally, if I ever won lotto, I'd have my own car shipped over to Germany, and take it for a spin along the Autobahn. I almost typed Autobarn then, but I've driven to Autobarn many times and it's nothing to write home about.
Other than that I'd probably nominate the following things
1. Buy a brand new Falcon. By my count I have either 3 or 5 years to make it happen.
2. Find, buy and restore an old rusted wreck of a car, back to showroom mint concours condition.
3. Own a V8 powered automobile. Preferably something like an NC Fairlane or VR-VS Statesman. Old enough that they still have a proper, OHV V8, yet modern enough that performance is reasonable and using one as a daily drive is a reasonable prospect.
4. Plan and execute the perfect crime. By definition, I can not do this now-having stated a desire to commit the perfect crime. If you tell someone of the plan, the crime is no longer perfect as I have opened myself to suspicion.
Beyond that there are very few things I actively want to do before I die. I did catch a train to Wollongong the other day which means that I have only to catch a train to Lithgow, Goulburn, Scone and Dungog and Cronulla in order to have travelled the entire CityRail Network. I guess if you want to be picky you could also add the Harris Park-Merrylands Y Link and the Lidcombe to Olympic Park line-having said that I have done Olympic Park to the City. i have also done Cronulla-Sutherland on a rail bus which technically does count I suppose.
I also would like to travel the Indian Pacific in first class and do the drive back across the Nullabor.