Parks
A number of Amsterdam’s parks are wheelchair-friendly:
Vondelpark is Amsterdam’s largest and most popular park, with 47 hectares of nature in the city centre.
Sarphatipark is located in the lively De Pijp neighbourhood in Amsterdam Zuid (South).
Oosterpark offers a green escape in the east of Amsterdam.
Westerpark is a big urban park with a variety of historic buildings, cafes, and creative spaces.
Toilets
Nearby restaurants with wheelchair-friendly toilet facilities include Vondelpark 3 (Vondelpark), Coffee & Coconuts (Sarphatipark), Park Cafe Hotel Arena (Oosterpark), and Bar Kantoor (Westerpark).
Address
I recommend using Google Maps to find the park entrance you would like to use.