Mark Zuckerberg and Wife Celebrate Wife in Rural Maine

When they got married, Mark Zuckerberg promised Priscilla that every year, the newlyweds would have a honeymoon to celebrate their marriage.

"One lesson I've learned from marriage is that exploring together just gets better over time," Zuckerberg wrote on his Facebook page. "Priscilla, here's to a great sixth year of marriage and perhaps some better planning in the future!"

Zuckerberg did not hint at where the couple would be spending time — and considering Maine topped 2010 U.S. Census Bureau data as the most "rural" state in the U.S., with 61.3 percent of the population living in "rural" areas, they could virtually be anywhere.