We're in pursuit of some of the world's best cyclists for today's Geo Quiz. The "Giro d'Italia" is celebrating its 100th anniversary as one of Europe's biggest cycling races. Top-notch cyclists, including Lance Armstrong, have been chasing each other around Italy for three weeks now. Giro d'Italia: www.flickr.com/photos/rattodisabinaGiro d'Italia: www.flickr.com/photos/rattodisabina This was Day 19 of the Giro -- a grueling 102-mile-long stage -- ending with a steep climb to the top of a mountain near Naples. And -- you guessed it -- we're looking for the name of that mountain. It's actually a volcano. Some 2,000 year ago - it erupted so violently it buried the nearby city of Pompeii. Today it's where Italian cycling fans have come to cheer on their favorites. OK -- take 5...to come up with the name of this volcano. Sorry to rush you -- we meant 5 seconds...

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