However for pant wetting excitement in your car, I also recommend la Place du Concorde in Paris when its busy (its always busy). Its not a roundabout as such, more a loose agreement.
This is so confusing I had to view it from top down perspective and I still have no clue how you would navigate through this.
It looks like a vehicle approaching the Magic Roundabout via A4312 can use the outer ring to exit via B4289 or Fleming Way but any other exit the vehicle must spin in circles to enter the inner ring. I give up.
There's only one Magic Roundabout. It was the result of an open tender and I think that the winning team was from a local college. There were five roads leading into a weird space and it needed fixing. It's not as bad as it looks. Actually, it is as bad as it looks when you first encounter it.
The centre (which doesn't really show up on Goog maps) goes anti-clockwise, bear in mind that we drive on the left and go clockwise around a roundabout usually. You can use the outside to avoid the centre completely, which is often faster. The main problem is that it is very heavily used and hence some of the markings are scrubbed out. Also it is easy to get disorientated but even if you fly out of the wrong exit, it is easy to use a side street later to get back on track.
I have to say that I would not recommend visiting Swindon to someone who usually drives on the right hand side. To be fair I don't really recommend Swindon to anyone 8) For me, the MR is the exciting end to a two hour drive to visit a customer - just what you need to wake you up at ~0930.
It's very simple: yield to people making a left from Shrivensham, then enter the first roundabout. The internal circle is not a roundabout, people already inside will yield to you. So you can continue going forward (over the KEEP CLEAR area) and navigate around the center anti-clockwise. You yield again to people from Shrivensham and depending on what exist you want you need to traverse another one or two roundabouts and exit the desired road.
If you need excitement in Europe, I can recommend anywhere near or in Naples (Napoli) or Rome, Paris, Deutsche Autobahns and most of Eastern Europe and the Balkans.
I am aware that European roads as a whole are rather straightforwards compared to some parts (OK most) of the world. For starters we have rules and most of the time they are nearly obeyed. However the rules are often not quite the safe as the official ones.
For example, I discovered that around Napoli, you use your entire car as an indicator. Once you wedge it into a tiny gap then people will generally give way but you have to be very quick and accurate. It may be coincidental that when me and wifey started observing properly, that we estimated that around 90-95% of cars in that area had visible damage and were generally of fairly low value (in general).
When I gave a lift to an interview candidate at my company, who happened to be Polish, he remarked upon our habit of letting waiting cars out of side streets onto the main road. "That would not happen in Poland" he said, but I'm sure it does sometimes.
Speaking very, very generally, and given my experience does not extend to Scandinavia and quite a few other local-ish lands but does include US and Canada, I would tentatively suggest that the UK is generally a safe place to drive and is, generally, a forgiving driving environment. Our road signs are possibly the best anywhere but we do have too many signs in some places.
Driving in China would scare the shit out of me and I'm pretty confident behind the wheel.
China is a whole different world driving-wise. After I got in a cab in Guangzhou, the driver immediately made a u-turn across 4 lanes of traffic, then drove the wrong way into a 5(?) lane roundabout (explaining "shorter this way"--he would have needed to go almost all they way around in the "correct" direction). No other drivers honked or indicted real surprise with either maneuver.
However for pant wetting excitement in your car, I also recommend la Place du Concorde in Paris when its busy (its always busy). Its not a roundabout as such, more a loose agreement.