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.

A major port city on the River Scheldt, Antwerp, Belgium, is a cultural, historical, and commercial hub and the country's most populous city. Known as the "diamond capital of the world," Antwerp is renowned for its cut diamonds.

Weimar, located in the heart of Germany’s Thuringia region, is a city renowned for its cultural heritage, classical architecture, and pivotal role in European history.

Kona started as King Kamehameha I's government seat, and is now a popular tourist destination with key landmarks like Hulihee Palace, as well as coffee farms, shopping and dining.

Hiroshima, a city on Japan’s Honshu Island, is a place where history and resilience intertwine to create a destination that is both deeply moving and inspiring. Beyond its historical significance, Hiroshima offers visitors a vibrant cultural scene.