For my first question here, let's start cool with a little sketch.
No, it's no hard brainstorming, no, it's not a revolution, yes, I had to start with something :)
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Perhaps those arrows signify specific squares in the Sudoku? Starting from the top left corner (marked with the big dot) and proceeding sequentially in the directions shown, we find DBDCDA, giving
tinyurl.com/DBDCDAwhich redirects to this page. (Thanks @Deusovi for help with this clue!)
A 1cm by 1cm by 2cm block is 2 cubic centimetres. According to Wikipedia, lutetium has a density of 9.841, so a 2-cubic-centimetre block would weigh 19.682 grams.
Substituting $ef,ghi=19,682$, we find (33.006167, -79.983557), which are the latitude and longitude of a road called Bravo in what looks like a housing estate with roads named after the words of the NATO phonetic alphabet, somewhere in South Carolina, United States.
So the final answer is