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.
The Fisherman's Bastion in Budapest, Hungary is a historic monument with stunning Neo-Romanesque architecture and panoramic views of the city. Built between 1895 and 1902 by architect Frigyes Schulek, it symbolizes the seven chieftains of Hungary who founded the country in 895. Originally part of the Buda Castle walls, it was restored after being damaged during World War II. Visitors can explore its seven high-pitched stone towers and enjoy the picturesque scenery overlooking the Danube River.
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