In the southern part of Stary Rynek and in the central part of the square, there are two buildings constructed in a modern manner. In my opinion they strongly deform medieval shape of the beautiful square.
Cloth shops and an arsenal were settled down there in the medieval ages, but it was not possible to restore them in a protogenic view because of absence of their real images. Now this place occupies a military museum.
I tried to avoid photoshooting and videoshooting of these buildings not to spoil fine photos of the square. I recommend you to make just the same.
Do not take a taxi from someone in the airport / train station with a sign. They will most likely charge you double if the hear that you're a foreigner. If you're staying at a hotel I would recommend that you have the hotel call the taxi for you. Also, negotiating a price is recommended.
Unique Suggestions: In Warsaw the airport posted the "friendly" taxi cab information. Please take their advice.
Fun Alternatives: Tram-Bus... But purchase more than one ticket because the time expires after about 10 min and you will need to stamp a new ticket.
Tipping is now common in restaurants and service has improved greatly over the last few years. 10-15% is an average estimate, if your service is good.
BUT, and this is a warning, when you hand over your money to the waiter/waitress, DO NOT SAY THANK YOU. If you do, you are implying that they should keep the change, and they do. My son was stung like this when he gave a 100zl note for a 26zl bill. And the waitress was far too attractive for him to lose his cool by asking for the rest.
So wait until your change arrives, then say thank you and leave your tip.
Don't be afraid if you are accosted by a large Polish woman upon entering the public toilet. You simply must pay to use all public toilets, usually around one zloty.
However, please note that while using a public toilet is a paid service it does not guarantee that toilet paper will be available. The toilet situation is improving throughout all of Poland, but it is still wise to carry some tissues into the toilet just in case, especially on trains.
In addition, some restaurants and bars are still irritatingly charging for use of the toilet even if you are a customer. Yes, it's annoying but in the end it's only a zloty. And just to thoroughly confuse you, Poland uses a circle to denote women's toilets and a triangle to denote men's toilets. Remember: women circles, men triangles.
Fun Alternatives: Don't think there is an alternative for this one!
When travelling by tram remember: the tickets are valid for certain number of minutes (days),or stops, you must predict your journey and use another ticket if it takes more time!!!