The Brandenburger Tor (or The Brandenburger Gate if you're not so great with German) is an absolute must-see attraction if you're visiting Berlin. Fun fact: From 1814 until 1919, only the royal family and members of the aristocratic Pfuel Family were allowed to travel through the centre archway. Which wouldn't have been so fun for us normal folk. Now, it no longer causes divisions. It's said to represent peace and unity and is one of Germany's best known landmarks.
Time Out Tip: for the best pics, take ’em from the east side so that you can see Tiergarten between the pillars.