<human>:  What is the most cost-effective way to travel in Europe
<bot>: The most cost-effective way to travel in Europe is by taking advantage of budget airlines for flights, or by choosing rail passes for longer journeys. Taking a bus or train between major cities often provides the lowest fares, and renting a car can be a cost-effective way to take day trips or drive between countries. Staying at hostels or couch-surfing can be cost-effective alternatives to hotels. Taking advantage of public transportation in major cities and researching budget restaurants and attractions can also help keep your costs low while traveling in Europe.