How Far Can You Travel In One Day?

Our English word Journey comes from the French word for 'one day.'
So how far can you travel in one day?
I asked this question in one of my recent creativity classes, Wanderers, Vagabonds & Pilgrims.
The answer for me depends on the mode of transportation.
In a plane I imagine I could fly halfway round the world, to a foreign country, to different food, language, customs, terrain.
On foot, well, I've walked 10 miles in one day and that was a lot so I imagine it would not be much farther than that.
Riding my motorcycle is a different story.  A few years back I actually rode 781 miles in one very long, exhausting day.
By car, perhaps farther.
By boat, I could travel out into the ocean, from one island to another, up river or down stream.
If I travel in my mind in an arm chair, I could go back in time and forward into the future, through stories and memories, past hunches, dreams, love affairs, hoped for new relationships, places I'm afraid to go for real, places that don't exist except in my imagination, because I know I've never seen them on any maps.  
I can travel the road of fear, or down the path to sin.
Some people in the class said they travel in circles, endless repetitions.  Others said they journey when they cook recipes from other lands.  And of course, there's the kind of travel we all can do when we read.
Where did you go while reading this?
I write because I have to.  I am a writer.
Ingrid, the Rune Woman
Changing Lives With Ancient Wisdom
Awaken Your Hunger