Copper River, Alaska's fourth largest river travels from the dry interior climate to the temperate rainforest along Prince William Sound.

No place on Earth quite compares to Antarctica, this stunning and vast continent is cold and windy, containing 90% of the ice in the world. Those who brave a visit here are rewarded with beautiful glaciers that must be seen to be believed, and a vast array of wildlife such as whales, penguins, Arctic foxes and seals.

Apia is the capital of Samoa and a lush paradise in the South Pacific. Replete with tropical beaches, coral reefs, and historical museums, Apia is the perfect place to immerse yourself in Samoan culture and experience the natural, biodiverse beauty of the South Pacific.

Nestled on the southern tip of California's Baja Peninsula, there's a feeling of peace on Cabo San Lucas, Mexico. Find your own private sand dune and bask in the sun. Walk along the famous Playa del Amor or explore Cabo's unique rock formations that are found in almost every cove. For a special treat, stop and watch artists create black coral jewelry.

The Yangtze River, a magnificent artery of China, stretches over 6,300 kilometers (3,917 miles) from the Tibetan Plateau to the East China Sea. As the longest river in Asia and the third longest in the world, it weaves through breathtaking landscapes and vibrant cities, making it a prime destination for travelers seeking both adventure and cultural immersion.