Death valley is the lowest place in the US well over 100ft below sea level.
80 metres (262 feet and 5.61 inches), 269 feet (81.99 metres) and 82 metres (269 feet and 0.346 inches)
The Dead Sea is a salt lake, bordering Jordan to the east and Israel and the West Bank to the west. Its surface and shores are 423 metres below sea level.
if the land surrounding the sea is below sea level
Hartford is an average of 59 feet above sea level. (It is along the banks of the Connecticut River, which flows into the Long Island Sound.)