For at least a few times already, all of our planet’s dry bits have come together to form a single, giant island in a single, giant sea. Roughly 200 million years ago, Pangaea was the last iteration of this recurring supercontinent.
Here’s what our world will look like at that time: the Americas attached to Africa in the north and Antarctica in the south; Africa slammed into Europe and the Middle East; and Australia welded to Asia’s east.
It’s unlikely that there will be any humans around to witness the reunification of the world’s land masses – we’ll be lucky to survive the next century – but the map includes some present-day cities nevertheless, for your orientation.