Actually my admiration of Poland started after my visits abroad. :)
The world is a big place with many attractions, not too many people are interested in spending there holidays visiting concentration camps and old buildings, there is a you have seen one you have seen them all mentality,
Very interesting logic. So you think that by visiting Paris, you don't have to visit London, Vienna, Amsterdam or Rome, because "once you saw one old building, you saw them all"? Common lef, you don't actually believe what you are saying, do you? :)
From my conversation with non poles, the greatest selling point is the cheapness of the place and the friendly people, good beaches is always a selling point, something poland has not got.
Poland is still cheap, so please don't overtake the facts. Bored with swimming, windsurfing, playing volleyball or taking the sunbath with German pensioners at the beach? :) Hire an aqualung and dive down to some of the 24 discovered wrecks that lay at the bottom of the Baltic sea. Due to the low level of salt the wrecks are beautifully preserved. Every month polish costal guards have to intervene as many tresure seekers are interested in the precious cargo of few Prussian ships that were sank at the end of WWII by Russian submarines.
Besides, poland doesn't only consist of beaches. It has a very pictieresque landscape and many beautiful national parks, eight of them - the Słowiński, Białowieża, Kampinos, Babia Góra, Karkonosze, Tatra, Bieszczady, and Polesie - have been entered on the UNESCO list of World Biosphere Reserves. So if you are an ignorant of Polish history, culture, food, liquer, cities and their night life, historical monuments than maybe at least you will appreciate it's mountains. :) I do.