[michalpt]

If you are heading to Central Europe, Prague to be more specific, I would recommend Machine Learning Prague 2017: http://www.mlprague.com/. Some pretty interesting names such as Lars Backstrom (Facebook), Yufeng Guo (Google) and Pierre Baldi (University of California) should show up.

[mfalcon]

That conference seems to be pretty interesting according to the schedule, but it starts in three days, there's no time to make the proper arrangements.