Unsurprisingly, the end of December is the beginning of the peak season for resort prices, so those who are able to come earlier in the month will be getting better deals. Still, the all-inclusive resorts are locked in heavy competition all year so this area can be a great deal compared to the alternatives, even in high season. If you are looking for where to go in December for an all-inclusive beach holiday, this is your best option for most people.
Aside from Indonesia you might also consider Thailand, which has great infrastructure so it’s much easier to travel with young children. Phuket has by far the most options, and its rainy season usually ends in early November. For families I recommend Kata Beach and Karon Beach, which are both just south of the main shopping and nightlife town of Patong Beach.
As the year winds down the parties amp up, none more so than in Scotland’s capital, where Hogmanay celebrations see flaming torches, fireworks displays and night-long parties take over the usually quiet cobbled streets. Slightly more sedate, the Caribbean’s southernmost island Trinidad simmers with stirring Spanish-style musical performances as the locals usher in the start of the dry season.
By early December the rainy season is pretty much over in Cartagena, and it cools down just a bit more as well, so the weather really doesn't get any better than this. As with most others on this list, right around Christmas you'll find that hotels get more expensive and are more crowded, so if you can go earlier in the month you'll be paying less and dealing with fewer crowds.
The Norwegian coastal city of Tromso, located more than 200 miles north of the Arctic Circle, is an enchanting winter wonderland in December. During the Polar Nights — when there is no sun at all — the opportunity to witness the Northern Lights is greatly increased. For another awesome view, take a cable car or an adventurous hike up to Floya, overlooking the city of Tromso and the surrounding mountains and fjords. The Polaria Arctic Experience Center and Aquarium is a family-friendly destination, both educational and fun. The 360-degree Planetarium at the Science Center in Tromso is another family option with breathtaking photos and a lifelike video of the Northern Lights. Stroll along Storage Street to be amazed at the number of cafes, restaurants, pubs, and shops featuring artwork, clothing, and crafts by local artisans. Mack’s famous Olhallen beer hall, established in 1928, is Tromso’s oldest pub, boasting Europe’s longest tap beer tower and a micro brewery. Their acclaimed Christmas Beer is released every December. Experience the Tromso wilderness on a dog sled or chase the glowing night sky on a reindeer sled with a native Sami guide. Tours range from four hours to five days. Whale watching is also ideal in December when humpbacks, killer whales, and several other species thrive on the plentiful herring fish in the fjords. Downhill and cross-country skiing opportunities abound for all skill levels.
Located off the coast of East Africa, the Seychelles—an archipelago consisting of 115 islands—is about as close to paradise as you can get. Crystal clear water, lush jungles, and powder-fine sand make it the ultimate early winter escape, particularly for romantic getaways. Book one of the 30 breathtaking pool villas at Six Senses Zil Pasyon, which is among the region's top luxury resorts. The hotel is situated on a private island that offers prime territory for snorkeling, sailing, kayaking, and hiking—plus, the spa has scenic pavilion-style treatment rooms that are worth the trip alone. Health conscious guests will be particularly impressed by the property's new "Eat with Six Senses" program, which is intended to make travelers leave vacation without the guilt that comes with overindulging. There are four tailor-made treatment plans that focus on sleep, detoxing, fitness, and more, depending on the issues you prefer to address.