Taxi's, Crete Island
The problem with gorges is that they start at one point and end somewhere else. So you have to walk back or try and find a way to drive back to where you left your car.
We had made an arrangement to be picked up at the end of the Imbros Gorge by my mother, who didn't want to come along and walk through the gorge. Some German tourists weren't as lucky and they tried to take a taxi back to Imbros. There were signs all over the place, that said a taxi would cost only Euro 2,50. But they would have to pay euro 18 at first and when some other people wanted to share the taxi with them (and the costs) the price suddenly went up to Euro 32. At that moment they decided to leave and find another way to go back to Imbros. Luckily for them, we gave them a lift (with 5 adults and 1 child in a little Citroen Saxo more than 10% uphill).
Unique Suggestions: If the taxi drivers don't keep their promise, just walk away, although they will probably start yelling at you and try to stop you from leaving.
Fun Alternatives: I have been told that there are also buses driving back to Imbros, but I haven't seen them. Of course you can also book a full trip with some travel organisation. This is a little more expensive, but it's easier than to arrange it all by yourself.