Last month i travel to Amsterdam with my husband and friends and went to one of the oldest zoos of mainland Europe: Natura Artis Magistra.
I followed Ana Rita Mendes very well written guide and arrive early and without problems. The zoo is easily accessible by tram and not too far from the center (about 30 minutes walking distance).
The ticket will grand you admission for the entire zoo (aquarium building and reptile rooms included) but it’s a bit expensive (21,50€ at the ticket booth).
My favourites were the aquarium, the butterfly house and the Japanese garden. Micropia was really fascinating.
A very well spent morning.