"Beautiful" or "Gorgeous"—common adjectives for describing the city. Děkuju: "Thank you" (polite version: Děkuji ).
For more practice, you can find similar graduated readings on Lingua.com which offers free worksheets for different levels. Complete Czech (free resources) - Teach Yourself Teach Yourself Czech
Today is a beautiful, sunny day in Prague. Jan is standing on Charles Bridge and looking at the Vltava River. It is his first visit to the Czech Republic. Jan wants to go to Prague Castle, but he doesn’t have a map and his phone isn't working. Teach Yourself Czech