Poland’s vibrant capital is showing up on more travel lists in 2025, and not just because Warsaw is one of the most affordable European capitals. As I zipped to the top of Varso Tower in a glass-enclosed elevator, I marveled at the city’s evolving landscape. At 1,020 feet, the neomodern structure is now the tallest building in the EU.   The 53-story skyscraper’s observation deck opens to the public this spring. Finally, visitors can look down on the Palace of Culture and Science, the drab...