It's difficult to predict the exact best destinations for travel in 2024, as many factors can influence travel trends, such as safety, politics, the economy, and public health. However, based on current trends and projections, here are some potential destinations to consider:

1. Costa Rica: Known for its stunning beaches, lush rainforests, and abundant wildlife, Costa Rica is a popular destination for eco-tourism. The country is committed to sustainability and has a well-developed tourism infrastructure, making it an attractive destination for travelers looking for an environmentally-friendly vacation.
2. Japan: Japan is a perennial favorite for travelers, and the country is set to host the 2024 Summer Olympics in Tokyo. This will likely drive increased interest in travel to Japan, with travelers eager to experience the country's rich culture, history, and cuisine.
3. New Zealand: With its stunning landscapes, outdoor activities, and friendly locals, New Zealand is a popular destination for adventure travelers. The country is also home to a thriving wine industry, with many excellent wineries and vineyards to visit.
4. Sri Lanka: Sri Lanka is an up-and-coming destination, with its rich culture, beautiful beaches, and stunning landscapes. The country is home to eight UNESCO World Heritage Sites, including ancient cities, temples, and fortresses.
5. Rwanda: Rwanda is a unique destination, known for its stunning scenery, wildlife, and commitment to conservation. The country is home to mountain gorillas, chimpanzees, and other primates, making it an ideal destination for wildlife enthusiasts.
6. Norway: Norway is a popular destination for travelers looking for stunning natural beauty, with its fjords, mountains, and northern lights. The country is also home to a thriving food scene, with many excellent restaurants and cafes.
7. Iceland: Iceland is a popular destination for travelers looking for unique landscapes, outdoor activities, and natural wonders. The country is home to geysers, waterfalls, and volcanoes, and is an ideal destination for hiking, birdwatching, and whale watching.
8. Peru: Peru is a popular destination for travelers looking for history, culture, and adventure. The country is home to the ancient city of Machu Picchu, as well as the Amazon rainforest and many other natural and cultural wonders.
9. Egypt: Egypt is a popular destination for travelers looking for a unique cultural experience, with its vibrant cities, colorful markets, and stunning landscapes. The country is also home to many excellent beaches, making it an ideal destination for sun and surf.
10. Canada: Canada is a popular destination for travelers looking for outdoor adventures, with its vast wilderness areas, national parks, and ski resorts. The country is also home to many vibrant cities, with excellent restaurants, museums, and cultural attractions.