A long journey in a ship or spacecraft
voyage
Travel by asking people to give you a lift
hitchhike
"Off the beaten track" means
in a place where few people go, far from any main roads and towns
The protection of animals, plants, forests, etc.
conservation
Able to continue without causing damage to the environment
sustainable
A short holiday in a large city
city break
A plan or list of the places you will visit on a journey
itinerary
A ticket for a trip from one place to another and back again
return ticket