Hidden in the northern region of Costa Rica, the Celeste River (Río Celeste) winds through Tenorio Volcano National Park with a color so vivid it seems unreal. The river’s striking turquoise hue is caused by a natural chemical reaction between two mineral-rich streams, Quebrada Agria and Río Buena Vista, which merge at a point known as "El Teñidero." This one-of-a-kind phenomenon creates the illusion that the water has been dyed blue, even though no pigments are present.

Thimphu, the capital of Bhutan, is a city where tradition and modern life meet in unexpected ways. Streets are lined with traditional Bhutanese architecture, colorful prayer flags, and shops selling handicrafts, while government offices and modern facilities operate alongside centuries-old temples.

The dazzling capital of the Czech Republic, the explorable Prague has fittingly been nicknamed "the City of a Hundred Spires." Halved by the Vltava River and notable for architecture Baroque, Renaissance, and Gothic, visitors will find much to take in here.

Bayonne, nestled in the heart of France's Basque Country, offers a delightful blend of history, culture, and gastronomy. This charming city, with its half-timbered houses and narrow cobbled streets, sits at the confluence of the Nive and Adour rivers, creating a picturesque setting that invites leisurely exploration. The Gothic Bayonne Cathedral, a UNESCO World Heritage Site offers stunning views and an opportunity to admire its breathtaking 13th-century architecture.

Alaska's largest city is the perfect place for anyone who wants a vacation filled with wildlife, outdoor activities, glaciers and gorgeous parks.