Reykjavik, Iceland
Iceland is a hidden gem of Europe. There's so much to see and you can get a great feel for the area in a short amount of time. Perfect for a long weekend trip from the United States, since it's also fairly close by in terms of flying. While I was in Iceland, some of my favorite scenic tours were the Black Sand Beach, Blue Lagoon, and the Golden Circle. This destination falls into the category of luxury destinations for the expense alone. Although booking a flight there may be cheaper with deals on airlines like Play, it is not cheap once you arrive. Be prepared for expensive meals, which are one hundred percent worth it for the price! The best rack of lamb that I have ever had was in Reykjavik and 50 USD later, I'm still not mad about shelling out the big bucks for the experience.
Oslo, Norway
Norway is by far one of the cleanest and most efficient cities that I have visited in Europe - and for good reason! The food and housing in Oslo is immaculate, with painstaking care taken to ensure an environmentally friendly stay. While meals here can be on the pricier side, the seafood especially is delicious! Restaurants line the water's edge in Oslo (even during the cold months) and there is nothing like putting on a warm coat and sitting under the heaters of the outdoor patio by the wharf. For those of you that love sushi, I found some of the best spicy tuna that I've ever had from a small little shack in the center of town.
Stockholm, Sweden
Sweden is another destination that falls under the luxury destination category based on the overall cost of living. Compared to other Nordic countries in Europe, Sweden can be just as expensive depending on the length of your stay as well as initial budget. While the country can get extremely cold during the winter months, there is nothing like visiting Stockholm during the Christmas season. Markets line the streets and wooden shacks hand out hot chocolate, along with traditional mulled wine. As long as you can stand the frigid temps, I'd also strongly recommend taking the ghost tour offered through Old Town (you can find it online through companies like Viator or Get Your Guide). It not only gives you and your group a fun evening adventure, but the guide regales those on the tour with tales of Stockholm's darker history. Most importantly, don't pass up the Vasa Museum, which sits on a small island in the center of Old Town! The Viking ships are a sight to see in this museum dedicated to maritime and treasures from the 17th century.