Question: Where is the lowest elevation in the world?
Disambiguated questions and answers: question: Where is the lowest known point in the world?
Where is the lowest elevation below sea level in the world?
answer: Challenger Deep
Dead Sea, Jordan
question: Where is the lowest, from sea level,  artificially made point in the world, with open sky?
Where is the lowest, from surface, artificially made point in the world with open sky?
Where is the lowest known natural point in the world?
Where is the lowest point on land not covered by liquid water?
answer: Hamach surface mine
Bingham Canyon open-pit mine
Challenger Deep in the Mariana Trench
Canyon under Denman Glacier
Natural Questions answer: Dead Sea (from the Wikipedia article "List of places on land with elevations below sea level")