The trip will take place over new years and last a couple of weeks.
It meant the trip must last many times longer than anyone had expected.
The whole trip lasts 56 days and costs from $5,200 a person.
Our trip lasted 10 days and that wasn't enough to see everything.
The average trip covered 2.64 miles and lasted nearly 15 minutes.
The trip will last from six to eight weeks, depending on weather conditions.
The trips usually last a week and take place during Easter.
The trip lasted four months and extended nearly 900 miles.
The trip began in September and lasted through the winter.
The trip lasts about 10 hours, including a change of trains in Washington.