Less than one hundred years ago, most people were born, lived and died within 100 miles or less. Today, people can travel all over the world in a few days or weeks. Modern transportation has changed how people work and live. People can live in one place, but work with people in another country.
In cities around the world, people travel on buses, street cars and subways. These modes of transportation are quick, inexpensive and often cleaner than cars.
Flying is one of the most popular ways to reach faraway destinations. Over half a million people are in the air at any one time.
Travelling can be good for the heart and soul. It can lower your risk of heart disease and reduce stress.