Hedonistic: Fly to Amsterdam one way, buy a few doses of truffles, smoke some weed, see some boobs or whatever floats your boat I dunno. Then go to centraal station, buy the first train ticket and keep traveling. Stay in hostels, be open to meeting people. Every hostel will point you to walking tours in the morning, and usually a group will go together. Just join that group.
Saying "Hey, I've got some mushrooms, why don't we all go find somewhere to do them and hike" is actually a great icebreaker at a hostel. It's how I met my (sober) wife. Making friends at hostels throughout Europe was how I rebuilt my life after burning out on my 100% tech social network.
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Nobel: Call up Habitat for Humanity, tell them you have 2 weeks free and want to help out on a build if they have any open in the country. I did this as well, it's how I learned carpentry.