OK, I’ve got some ideas for you. I’m jealous.
I’ve never been to Germany, so can’t help you there, but we visited Belgium last summer. When you are in Brussels, do NOT miss the waffles. They’re usually only one euro for a plain one, a bit more with toppings (tourist style, heh). A “Brussels waffle” is basically what you get in the U.S. when you order a Belgian waffle (a big waffle). It’s ok, but get a Liege waffle instead–it’s dense, chewy, and full of caramelized sugar bits. Get at least one just plain. They’re cheapo street food and they’re all over Brussels and they’re just wonderful!
While in Belgium, try as many different beers as you can. They’re justifiably proud of their beers.
Also in Brussels: if you like old churches with chunks of dead saints and amazing statues, you can’t miss St. Michel & St. Gudula cathedral. It’s just gorgeous. Easy walking distance from the Grand Place, which is a definite must-see. Eat a meal there, the bottom level is all restaurants. There’s also a street that leads off the Grand Place with nothing but restaurants.
I loved Luxembourg City so much I wanted to move there. Don’t miss the Bock, the old fortifications. For a few euro, you can take a walking tour of the Casemates. Definitely worth doing. Also, walk to the Place de la Constitution (where the Gelle Fra is, the big monument with the golden lady on top) and from there, spend around 5 Euro (iirc) to take a 45-minute mini-train tour of the Petrusse valley in the old part of the city. They give you headphones and you can pick your language…it’s a cheesy retelling of the history of Luxembourg, really funny actually. My son and I were laughing so hard we were CRYING. It was awesome, and one of the most beautiful cities I have ever seen. And it’s all an easy walk from the train station, and not expensive at all!
Oh, in Luxembourg, try Diekierch beer. It was just the most light, refreshing beer ever.
In Amsterdam, There are so many fun things to do, I could hardly even start you off. But if you want to see what the city looks like, take a canal cruise. It will orient you and give you a good look in an hour or two. Touristy, but essential for the first-time visitor. They’re around 10-15 euro if you just step on at one of the many kiosks.
I second the poffertjes and stroopwafels. Do get a beer with the traditional Dutch sawed-off head. If you tell your German friends about that, you’ll get a laugh.
I don’t bother smoking dope, since I’m not really a fan, but you’ll smell it coming out of coffeehouses from time to time. Speaking of coffee, maybe one of our Dutch dopers can explain to me why a latte is a “koffie verkeerd” (wrong coffee). Huh?..
Oh, if you want a fun place to just walk around in Amsterdam, how about the Albert Cuypstraat market? It’s a huge flea market, but the people-watching is awesome. It’s full of locals. Albert Cuyp Market - Wikipedia
For Germany, I got nothin’. My husband is Dutch, and for some unmentionable reason, he and his family don’t spend a lot of time visiting Germany, so I’ve never gotten to see it. Maybe when you get back, you’ll let us know what you enjoyed, ja?
Goede reis!