Mount Everest

At Mount Everest's summit (~8,849 m), air pressure is only ~33% of sea level, so water boils at about 70 °C. Since bubbles form well below 100 °C, pasta stays undercooked and eggs won't hard-boil — no matter how long you heat them on the world's highest peak.

The Sherpa advantage on Mount Everest is not just more blood. Many people adapt to altitude by making extra red cells, but Sherpas can have lower hemoglobin while their muscle mitochondria use oxygen more efficiently — a result of long evolution.

The point farthest from Earth's centre isn't Everest but Ecuador's Chimborazo. Earth's spin bulges the equator, pushing sea level there ~22 km farther out than at the poles. Although Chimborazo stands 2,585 m lower than Everest, its summit sits 2.1 km farther from the centre.