The walking banana tree one was actually on one of the very early series of QI. Anecdotely, there is evidence of some walking much more than 40cm in their life time.
The subway trip instead of walking 275m is actually not surprising, and I'm actually more surprised at how low the £105,000 figure is.
That equates to 105,000/365 = £287/day. Given a cost of around £3, that means only 90 tourists/day make this trip. When you are in a foreign city, you are much more likely to ride than walk a trip like this, as firstly, most aren't sure how far it is, and secondly, if you have a long day planned, the saved time and saved "legs" can be worth it!
The subway trip instead of walking 275m is actually not surprising, and I'm actually more surprised at how low the £105,000 figure is.
That equates to 105,000/365 = £287/day. Given a cost of around £3, that means only 90 tourists/day make this trip. When you are in a foreign city, you are much more likely to ride than walk a trip like this, as firstly, most aren't sure how far it is, and secondly, if you have a long day planned, the saved time and saved "legs" can be worth it!