Our good friends at Google run a daily puzzle challenge and asked us to help get them out to the geeky masses. Each day’s puzzle will task your googling skills a little more, leading you to Google mastery. Each morning at 12:01 a.m. Eastern time you’ll see a new puzzle, and the previous day’s answer (in invisitext) posted here.

SPOILER WARNING:
We leave the comments on so people can work together to find the answer. As such, if you want to figure it out all by yourself, DON’T READ THE COMMENTS!

Also, with the knowledge that because others may publish their answers before you do, if you want to be able to search for information without accidentally seeing the answer somewhere, you can use the Google-a-Day site’s search tool, which will automatically filter out published answers, to give you a spoiler-free experience.

And now, without further ado, we give you…

TODAY’S PUZZLE:

You see sandbags piled at the junction of Friedrichstraße and Zimmerstraße. What symbol of the Cold War do they protect?

YESTERDAY’S ANSWER (mouseover to see):

Search [composer Das Lied von der Erde] to find Gustav Mahler. Search [Gustav Mahler] and learn that his symphonies weren’t well received initially and that “Das Lied van der Erde” was never performed publicly during his lifetime. Search [Gustav Mahler grave] to find that during the premiere, Mahler was in the Grinzinger Friedhof cemetery in Vienna, Austria.

Homepage photo: FEMA/Wikimedia Commons