The Nauvoo Temple. This is a reconstruction of the original since the original was gutted by fire, then destroyed by a tornado after the LDS members were driven out of the city back in the 1840's.
This is also photo number #3650, so I'm at 1000% complete. But I'm not yet at 10 years because of leap years.
I started my photo-a-day project on September 6th, 2004 on livejournal, transferred it here around 2011. All photos were taken on the day they're posted...