What is the highest mountain in the world?
Which country has the highest population in the world?
What is the highest waterfall in the world?
Which desert is the highest in the world?
What is the highest capital city in the world?
Which river has the highest volume of water flow in the world?
What is the highest volcano in the world?
Which building is the highest in the world?
What is the highest plateau in the world?
Which tree is the highest in the world?
Which statue is the highest in the world?
Which dam is the highest in the world?
Which lake is the highest navigable lake in the world?
What is the highest railway in the world?
What is the highest mountain pass in the world?
Which bridge is the highest in the world?
Which waterfall is the highest in Africa?
Which sea is the highest in the world?
Which tower is the highest in the world?
What is the highest ocean in the world?
What is the highest dam in Asia?
What is the highest airport in the world?
What is the highest island in the world?
Which country has the highest life expectancy?
Which road is the highest in the world?
What is the lowest point on Earth?
Which is the lowest point on land?
What is the lowest capital city in the world?
Which lake is the lowest in the world?
Which is the lowest river in the world?