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.
Excellent introduction to kayaking is to be had right in the town of Ísafjörður. Take a short paddle and enjoy the mountain views from the water. If you're lucky you'll see seals from up close.