Berlin to Amsterdam is a long haul. But if you want you can do it during the day. I did it at night to save on accommodation and time. I went direct from Berlin to Brussels then Brussels to Amsterdam. I can say that if you go overnight train from Berlin to Brussels and then onward to Amsterdam you see some pretty neat countryside during the 3-hour ride (Brussels-Amsterdam).
Hope this helps.
"To Alcohol! The cause of--and solution to--all life's problems." -- Homer J. Simpson
"I didn't get to where I am today worrying about how I am going to feel in the morning." -- Ron White (Blue Collar Comedy Tour)
"I was born to lose and destined to fail." -- Mike Ness, Social Distortion
"Eat healthy, exercise daily, die anyway" -- My motto
"Everyone I know, goes away, in the end...I will let you down, I will make you hurt..." -- Johnny Cash (NIN Cover of "Hurt")
I am traveling around the world until I find something that makes me want to stop. I am an aspiring photographer and hope to find whatever it is I am looking for...