Abstract type "TravelTips" must resolve to an Object type at runtime for field "Query.travelTipBySlug". Either the "TravelTips" type should provide a "resolveType" function or each possible type should provide an "isTypeOf" function.
Where to fly into
Arriving in Switzerland
Zurich is the best airport to fly into, but Geneva could also work. If your travel day was really long, stay overnight at the Hyatt at the Circle, which is right outside of the Zurich airport & has easy access to food, the train station, & a park.
Looking for things to do?
Go check out my guide for the best free things to do as well as itineraries and travel tips to make your trip unforgettable.
Go to Guide