My dream is to travel the world.

His sudden visit surprised me.

I can't stand this absurd situation.

I am surprised by the absurdity of this world.

We have a responsibility to make this world a better place.

Esperanto is one of the most famous international auxiliary languages.

He set out on a journey in search of a new world.

He set out on a journey in search of the New World.

He is interested in the history of the Old World.

His grandfather fought in the Second World War.