Story, photos by Dave Brosius  Twenty years of marriage calls for something bigger than a mere sampler platter and a couple umbrella drinks. I know, you think I mean “also the cheesecake”. And while not wrong per se, you can do better. We say, plan an adventure that would be sure to put a mammoth-sized dent in the savings that you’ll have to explain to your accountant later with a car. The kind with the heavy card stock and embossed gold foil. Sorry, Sheila! So how did we mark our first 20 years? After a little debate, we came to a conclusion: A two week Mediterranean Cruise to Greece, Turkey,…