1. Festival No. 6, Portmeirion, Wales
We've already established that Portmeirion is a fairy tale come true, which makes it the perfect spot for the ethereal Festival No. 6. The festival brings in big pop and rock acts, DJS, classical choirs, and cultural speakers.
This year's line up features Belle & Sebastian, Catfish and the Bottlemen, Mark Ronson, Irvine Welsh and more.
2. Iceland Airwaves, Reykjavík, Iceland
Keep it chill with a weekend at the Iceland Airwaves Festival in Reykjavík. The 16 year strong festival brings in Icelandic and international acts to 5 venues over 4 days. If you want even more from the experience, Reykjavík's famous Blue Lagoon hosts even more events during the festival down times.
This years line-up will feature Björk, East India Youth, Father John Misty, and more.
3. Glastonbury, Pilton, England
The famous British festival has been an annual event since 1970 and is made up of 25 areas, with 3 main stages. The mega fest brings in top names in every genre, and never leaves a dull moment.
This year's line up includes the Foo Fighters, Kanye West, Lionel Richie, George Ezra, Flying Lotus, and more.
4. Bonnaroo, Tennessee, USA
This Midwestern American gem is an absolute must for festival goers. The epic four day fest brings in 150 artists plus comedy and cinema events, and is known for its community fountain.
This year's line up includes Billy Joel, Kendrick Lamar, Hozier, Dangelo and the Vanguard, and more.
5. Exit Fest, Novi Sad, Serbia
The 'Best Major European Festival' of 2014 is held at the unique and Petrovardian Fortress and its surrounding, offering both city-centre and more natural stage areas. Born out of a Serbian peace movement, the festival brings in various acts from around the world.
This year's lineup will feature Tom Odell, Motorhead, Fear Factory, and more.
6. Ultra Korea, Seoul, South Korea
This off-shoot of Miami, USA's electronica Ultra Festival is a massive hit in Korea. The two day Seoul-based festival brings in star DJs from around the world.
This year's line up will feature Davie Guetta, Knife Party, Skrillex, Snoop Dog, and more.
7. Sziget, Budapest, Hungary
This week long festival in Budapest is a true getaway, held on a small island in the middle of the city.. The colourful and creative grounds are great to explore between performances by international stars, plus arts and crafts activities.
This year's lineup will feature Robbie Williams, Ellie Goulding, Limp Bizkit, Passenger, and more.
8. HellFest, Clisson, France
One of Europe's most extreme music festivals, HellFest is a must-attend for lovers of heavy metal and hard rock. The event features a decked out city square and market place, while its name and wild antics have received negative responses from French conservatives.
This year's line up will feature SlipKnot, Billy Idol, Marilyn Manson, Faith No More, and more.
9. Splendour in the Grass, North Byron Parklands, Australia
Australia's largest winter-season festival is a chill and delightful three day run, with plenty of arts and crafts activities to compliment the full line up.
This year's line up will feature Of Monsters and Men, Everything, Everything, Jenny Lewis, and The Vaccines.
10. Bravalla, Norrköping, Sweden
The Swedish Bravalla festival has only been going since 2013, but has made a major splash and continues to bring in massive music stars to its stunning and busy venue.
This year's line up will include Muse, Calvin Harris, All Time Low, and more.
11. Isle of Wight Festival, England
The famous British festival rose out of the counterculture movement in the late 60s. Now the event attracts artists and attendees throughout the world, offers luxury "glamping options", and features three stages.
This year's lineup will include Fleetwood Mac, Paulo Nutini, Foxes, and more.
12. Open'er, Gydnia, Poland
This festival sponsored by Heineken has been bringing in big acts to the north coast of Poland since 2002. The massive festival also includes a fashion runway, carnival rides, and a silent disco.
This year's line up will include A$ap Rocky, Alabama Shakes, Django, Django, St Vincent, and more.
13. Flow, Helsinki, Finland
This three-day festival in Helsinki features a large sampling of artists from Finland and abroad, and prides itself on its environmental focus and carbon neutrality.
This year's festival will feature Beck, Florence + The Machine, Diplo, Pet Shop Boys, and more.
14. Solidays, Longchamp Racecourse, France
This massive French festival is the brain child of the French AIDS awareness group, Solidarité sida. 150 artists, French and international, perform for upwards of 170,000, with proceeds of the festival going to AIDS charities.
This year's lineup will feature Angus and Julia Stone, The Vaccines, Camo & Krooked, and more.
15. Barrakud, Corfu, Greece
Barrakud brings clubbing to the seaside with this intense 4 day festival on the shores of Greece.The festival campus takes up the beach, features a panoramic pool, caves, and a club floor.
This year's lineup will feature Lone, Kangding Ray, Dawd, and more.
16. Lollapalooza, Illinois, USA
This annual festival in the heart of Chicago features acts across the board, from alternative rock to hiphop, as well as incredible food and craft areas. The festival began in 1991 as a farewell concert for Jane's Addiction, and has carried on since.
This year's lineup will feature Metallica, Sam Smith, Charli XCX, and more.