The third point here is about whether the basin of the dead sea is really the lowest spot on earth ?
Lowest point (natural)
The lowest known point is Challenger Deep, at the bottom of the Mariana Trench: 10,911 m (35,797 ft) below sea level. Only three humans have reached the bottom of the trench: Jacques Piccard and US Navy Lieutenant Don Walsh in 1960 aboard Bathyscaphe Trieste and filmmaker James Cameron in 2012 aboard Deepsea Challenger.
The point closest to the Earth's centre (~6,353 km (3,948 mi)) is probably at the bottom of the Arctic Ocean (greatest depth 5,450 m (17,881 ft)) near the Geographic North Pole (the bottom of the Mariana Trench is near 6,370 km (3,958 mi) from the centre of the Earth). }}
Earth’s Lowest Elevations