H I moment-0 map of NGC 5457 (M101), overlaid with the locations of highly likely sites of galactic fountains. Regions are categorized based on quality flags (Q): red dashed ellipses mark holes from K93 with Q ≥ 15, red solid ellipses show newly identified holes with Q ≥ 15, purple dashed ellipses correspond to K93 holes with 10 < Q < 15, and purple solid ellipses mark new detections with 10 < Q < 15. The background blue-scale image shows the integrated H I emission, with brightness scaled between the 10th and 98th percentiles. The nine regions in red are the identified sites of galactic fountains.