From major metropolises to charming, overlooked locales, Europe is brimming with cities everyone should visit. But where does a

penny-pinching

adventure-seeking

twenty-something


even begin when it comes to traveling Europe?

Berlin, Germany

By night, Berlin boasts some of the best nightlife Europe has to offer -- whether you want to listen to some low-key live music or rave the night away, there's a club for every style.

Riga, latvia

2014 European Capital of Culture
Iconic architecture, museums, and the historic center which is also a UNESCO world heritage site.

stockholm, sweden

Summer is the perfect time to explore the 30,000 islands that make up the Skargard Archipelago. Stockholm is described as being hip, exciting, and undeniable beautiful.

Copenhagen, Denmark

The capital of Denmark is possibily one of the most charming, friendliest cities on Earth. Hop on a bicycle and explore Copenhagen.

Fira, Greece

The perfect place to slow down, relax, and admire some gorgeous scenery. Sample delicious Greek cuisine while sunbathing on the island's black sand beaches.

Oslo, Norway

Oslo is a city full of unique museums, like the viking ship museum. The city has no shortage of natural beauty, set on a backdrop of forested hills and the Oslo Fjord.

Cesky Krumlov, Czech Republic

The greatest place you've never heard of. The stunning castle city is located in the Bohemia region of the Czech Republic. Lots of riverfront cafes to frequent.

Budapest, Hungary

The "Hipster Capital of Europe." The "Playground of Twenty- Something's." Perfect for young travelers looking for cultural enrichment and uber-cool nightlife.

Lisbon, Portugal

Overlooking the Rio Tejo, Lisbon has been described as "a mirror of a thousand colors," which basically means it's really pretty. Lisbon is known for being culturally rich and always exciting.

Barcelona, Spain

Barcelona's energetic atmosphere makes it a must-visit metropolis. Set on the Mediterranean, there's activity for everyone here. Check out Gaudi's famous La Sagrada Familia, hang on the beach, sample tapas, browse La Boqueria market, and party until the sun rises.

Krakow, Poland

Krakow is a "treasure trove" of historic architecture and boasts more historic buildings and monuments than any other city in Poland. Never- ending supply of cultural and political history.

Dubrovnik, Croatia

It's hard not to fall in love with Dubrovnik. The sights alone -- breathtaking views of the Adriatic Sea, ancient city walls, stunning Baroque buildings -- will have you dazzled. Relax on a beach, explore the historic Old City, take an island excursion and immerse yourself in the laid-back Mediterranean lifestyle.

Lviv, Ukraine

One of the most mysterious and enchanting cities in Eastern Europe, Lviv is known for its beautiful historic center and "deep-rooted" coffeehouse culture.

Dublin, Ireland

If you imagine Dublin as a place with cobblestone streets and pubs flowing with beer, you're on the right track. But there's more to Dublin beyond booze -- like a history spanning more than 1,000 years. Of course, you must visit the Guinness Storehouse and drink as many pints of beer.

glasglow, united kingdom

Scotland's largest city is hedonistic, stylish and always abuzz. Glasgow has a vibrant arts culture and a stellar live music scene, plus renowned architecture, so you'll have your pick of creative enrichment. Of course there are also museums and galleries, restaurants and pubs, and friendly locals.

Rotterdam, Netherlands

Yes, Amsterdam is great. And you should visit there. But Rotterdam is often overlooked, and it's just too cool for that to be the case. Rotterdam is a multicultural port city, with an ever-changing skyline, bumping nightlife and some great museums

Brussels, Belgium

Reasons to go to Brussels: chocolate, waffles, beer. Oh, and some really pretty architecture, historic sites and a cozy cafe culture.

Florence, Italy

Ah, Firenze! Beautiful, historic and charming, Florence will steal your heart. Art history buffs will be in heaven after trips to the city's many churches.

Reykjavik, Iceland

The world's most northerly capital is quirky, beautiful and just a little wild. In the summer, the city is in near-perpetual daytime with about 22 hours of sunshine -- so there's plenty of time to explore. And in winter, visitors can chase down the northern lights and take in the view of a lifetime.

Helsinki, Finland

The seaside town is known for its coastal beauty, maritime history, parks and green spaces, Art Nouveau architecture and, of course, saunas and spas. Helsinki was also named one of Europe's hottest "start-up capitals" in 2013, so its tech-friendly vibe is perfect for millennial travelers.