A strong desire to travel is called wanderlust. If you dream of backpacking through Europe and then taking a quick spin through southeast Asia, you have wanderlust.
The Germans call the strong urge for travel wanderlust, literally a desire for wandering. We loved the German efficiency of the word so much we annexed it for our own language. With a word like lust inside it, wanderlust really captures the dreamy passion travelers all share. Sometimes the word is also used for people who can't make a commitment to a job or a relationship.