Summer and vacationing are practically synonymous. Unfortunately, not everyone can afford to go continent-hopping for a month or two every year.
But even if you do have the budget for a summer vacation, why pay for something you can do for free? If you're particularly adventurous,
 these 10 options could help you see the world for little to no money.

1. Travel Hack
There's an entire community of people who spend their free time "travel hacking." This involves scouring the Web for deeply discounted flights, using special credit cards to rack up hundreds of thousands of travel rewards points, and employing other offbeat strategies to travel for free - or darn close to it.
Monica Williams, a law firm marketer in Philadelphia, used travel hacks to traverse the globe full-time for 15 months. "I signed up for a bunch of hotel and airline loyalty points and miles programs. I stacked up on miles and points through mile runs (cheap flights just to get miles), and increased my mileage by shopping for my everyday items on the airlines' shopping portals," she explained.
Williams noted that while she paid for just about everything with her AAdvantage credit card, she always paid off the balance in full each month in order to avoid any interest charges. Keep in mind, too, that you can earn miles without actually traveling; simply be strategic about where and when you make your everyday purchases and you'll have enough miles to take a cheap vacation in no time.
2. Teach English Abroad
Becoming an English teacher is easier than you might think - if you teach in a country other than the United States.
By completing a TEFL or TESOL certification, you can travel to just about any country to teach English for several weeks at a time. In exchange, room and board will be covered, along with a stipend for spending.
Keep in mind, however, that where you teach will impact how much you earn. The Middle East, for example, offers some of the most lucrative English teaching jobs, where you can expect to earn up to $4,000 per month along with benefits like insurance.
3. Join Peace Corps
A volunteer program run by the U.S. government, Peace Corps sends Americans abroad to countries in need of service. You'll need to commit to two years of service and the destinations are usually not very glamorous, but it's a noble cause that can provide you a unique global perspective.
In addition to a monthly living and housing allowance, full medical and dental coverage, and 48 days of paid vacation, you're provided a pre-tax "readjustment" allowance of more than $8,000 when you complete the program. Plus, you can also work toward Public Service Loan Forgiveness or cancellation of your Perkins student loans.
4. Write About Travel
You don't have to be a seasoned journalist to get paid to write about your travel experiences (although it definitely helps).
"When you write about travel and build your own following, you'll start getting invitations to press trips. These trips often include airfare and hotel stays along with food and activities," said Holly Johnson, the blogger behind Club Thrifty. "You can occasionally bring a family member or friend as well, which can make for a nice trip. In exchange, the resort or tourism bureau who invited you will expect coverage," she added.
In addition to magazines and online publications that hire writers to travel the world and write about exotic destinations, you can also get paid to write online reviews of hotels and even do research for guidebooks.
5. Join a Work Exchange Program
If you don't mind getting your hands dirty, you can sign up to offer a few weeks of your labor overseas in exchange for room and board.
World Wide Opportunities on Organic Farms (WWOOF) is one of the more well-known programs, which matches volunteers with organic farms and growers. For a small annual membership fee, you gain access to 208 farms in 45 countries.
Workaway is another service that lets you volunteer across different countries for free room and board.
6. Couchsurf
It's not exactly as glamorous as spending the night in a four-star luxury hotel, though it's probably better than staying in an overcrowded youth hostel. Sites like Couchsurfing.com and Staydu help connect generous hosts with travelers who wouldn't mind shacking up with strangers for a couple of days.
7. House Sit
Charli Moore of blog Wanderlusters said she's been securing free accommodations while traveling by house sitting over the last five years. "I have stayed at over 30 properties in 11 different countries, including a multimillion-dollar home in Barbados and a lifestyle property in New Zealand where I had to look after a troop of alpacas!"
Moore explained that housesitting has significantly cut the cost of travel so that he could visit more expensive destinations, as well as put her in touch with people she'd never have met if she stayed in a hotel.
"I've also had the confidence to visit off-the-beaten-path places thanks to the fact I know I'll be inducted into the local community and step into the home owner's shoes whilst there," said Moore.
8. Work on a Cruise Ship
Perhaps you're a talented entertainer, an experienced chef, or wouldn't mind simply working as part of the crew. While you will be stuck with your coworkers in the middle of the ocean for weeks on end, joining the staff on a cruise ship is an effective way to travel for free.
9. Guide Tours
Though you must be a certified expert in most cases, you can get paid to hop from city to city and lead tours for other visitors as an international tour leader.
Depending on the position, you might get paid - or you might work solely for tips. It's also a highly coveted position and the competition can be fierce; it definitely helps to be an exceptionally knowledgeable and personable guide.
10. Become an Au Pair
If you love children as much as traveling, consider becoming an au pair.
Essentially, au pairs are live-in nannies who join families abroad for a set period of time. Room and board are covered, as is often airfare and even a salary in some cases. Sites like InterExchange can help match you with a family in need of au pair.