Nice -> Monaco
I went to Monaco on a business trip several years ago and yes, the helicopter from Nice cost about the same as a taxi. A colleague who had been before recommended taking the helicopter - and with me being a bit of an aviation nerd who had never flown in a helicopter before, this sounded ideal. My BA flight from London was late and I finally landed at Nice about midnight, by which time the desk for the helicopter company was closed. The only option was to get a taxi to my hotel. The motorway was closed thanks to roadworks, so the driver took some obscure country back roads and we descended into Monte Carlo from the hills. It was a spectacular drive. Also it wasn't cheap - about 90 Euros, which used up the 100 in cash that I'd brought "to get me through the first couple of days" (ah, how little I knew).