When I look at some of the trees pictured below I almost have to pinch myself to believe that they are real. Some could belong on a science-fiction film set.

I confess to a love of olive trees and covet one for our garden. But (trying not to be too fussy) it would have to be quite gnarled, which equates to expense. Furthermore, olives are currently suffering from a disease that has already killed millions of these trees in Italy. The olive groves of Greece and Spain are also under serious threat.
[Later: this wish has now come true! We are the proud owners of an old (over 100 years) olive tree with confirmation that it is clear of the xyllela disease. The tree has produced flowers and these may eventually produce fruit. This reassures us that it is alive and well. Getting the tree from the delivery truck to its current growing position in the garden was quite an effort but it was well worthwhile.]

[ I must point out that some of the photos shown are not mine. I have 'borrowed' them from the Internet and hope that this does not compromise anyone, but I am very grateful for their use. It's not easy to find the names of those to whom one should give credit. ]