User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-10750309-20130921204516

So yeah, Riordan tweeted photos of places where some parts of the House of Hades will feature. And your twitter said that the photo is a Fountain of Neptune in Bologna, Italy. So I think the Argo-II-nauts (LOL) will go back to Italy to do something to get pass the ourae?