Found near Wilanów Palace and St. Catherine’s Church, this barrel-vaulted U-shaped tunnel extends for more than 200 feet, but until now, much of its history has remained shrouded in mystery.

People visit the 15th Tulip Exhibition held at Wilanow Palace in Warsaw, Poland on April 5, 2025. The event runs through April 6. (Photo: Xinhua) This photo taken on April 5, 2025 shows tulips on ...

The former palace of King John Sobieski III, a baroque-style property built in 1677, now welcomes visitors to explore its royal apartments, chapel, library and galleries. And surrounding the ...