The trip in Germany 2017

I visited Germany with my japanese friends who like paleo-animals and museums.
The 1st day, Stuttgart
The 2nd day, Tubingen
The 3rd day, Holzmaden
The 4th day, Frankfurt Senckenberg
The 5th day, Idar-Oberstein
The last day, Frankfurt Zoo.
We really enjoyed staying in Germany!
I introduce the detail of this trip later.