Travel and marriage spread renaissance ideas, By when you married you would spread ideas to you kids and spouse, and when you travel you spread it where you go
Not sure what information you're looking for on travel. There are lots of ideas for travel all over the world. See the resource site for family vacation ideas.
Any international travel forum would be a great place to present your ideas for international travel. Local travel agencies may also be a place to look for if you are inclined to do so.
Trains made it easier to travel long distances
Intercultural festivals and intermarriages are some of the ways in which ideas travel from one culture to another.
Some goods and ideas could travel easier than others for a variety of reasons. The goods may be able to travel easier due to being lighter than other products, and ideas may travel easier if the person that spreads the idea is someone who is in power.
Travel
Trains meant that long distances were not an obstacle to travel.
Because of trade. The trading that was between them caused their ideas to spread.
You can find many wonderful ideas for cheap senior travel at www.seniortravel.about.com and www.seniorliving.about.com. Look into group tours organized for those in their senior years.
King David did not have any unique ideas, so there is no question of their traveling.
There are many different types of places that someone can find ideas for travel. Depending on the type of vacations, or sights to be seen, the ideas would be different for for everyone. Different magazines would offer different ideas, for instance; FHM, Maxim, and Cosmopolitan. There are different travel related blogs that have a wealth of information contained within them as well.