Board Thread:Question and Answer/@comment-112.198.133.97-20170213034653/@comment-8642280-20170213035457

If you look at the Buildings page, under 'Resource Decorations', order it by 'Exp Gained' in descending order, and see what is best to build repeatedly to earn your exp a lot quicker.

So from the page, apparently top 3 are; White Horse Statue, Relaxation Pond, and the Obelisk. Personally though, I would do Parliament Building to lvl 10, then sell, market resources to equalize them again, then rebuild Parliament Building again.