The National Trust for Historic Preservation is running the 2011 edition of its "This Place Matters" competition, where voters support local sites worthy of saving.
Getting a big push this time around is the Astrodome, thanks to the folks at Houston Mod, which celebrates all things Mad Men-ish.
"How many buildings have been the site of a Mickey Mantle home run, welcomed the Gemini astronauts and hosted a concert by Judy Garland with The Supremes all during their opening year? Just one that we know of -- Houston's Astrodome," the group says.
Voting ends today. You've got to register to do it, but we know people are passionate about the Dome.
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The Dome is going up against 99 other places. If it wins, Houston Mod gets $25,000 to further its preservation efforts.