Istanbul is the only city in the world that spans two continents — Europe and Asia.

There are no rivers in Saudi Arabia — all water comes from rainfall, groundwater, or desalination.

The Great Rift Valley in Africa may eventually split the continent in two, forming a new ocean in millions of years.

The 2019–2020 Australian bushfires burned millions of acres.

The Colosseum in Rome could hold between 50,000 and 80,000 spectators and had a retractable awning called the velarium.

New Zealand was one of the last large landmasses to be settled by humans, around 1250–1300 AD.

The Earth's crust is divided into tectonic plates.

There are abandoned cities on Earth that nature is slowly reclaiming.

The Sahara Desert contains vast rocky plateaus as well as sand dunes.