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.

Dubrovnik, often hailed as the "Pearl of the Adriatic," is a city where history and stunning natural beauty converge. Enclosed within its ancient city walls, which are a UNESCO World Heritage Site, you’ll find a captivating blend of medieval architecture and vibrant culture. The city's Old Town is a maze of cobblestone streets, lined with baroque churches, Renaissance buildings, and charming squares.

A series of gates surrounds the two centers of ancient, medieval Fez (sometimes spelled Fes). The principal axes link the center to the gates and a street surrounds the heart of the old city. The Kairouan quarter, which is longer, is crossed by an artery. Narrow, tortuous pedestrian streets, covered passages, stairs and numerous dead-ends make up the dense layout with few urban squares.

The Cayman Islands, a trio of tropical gems in the western Caribbean, are renowned for their crystalline waters, coral reefs, and relaxed island lifestyle. Grand Cayman, the largest, is home to the famous Seven Mile Beach, a stretch of soft white sand fringed by turquoise seas.

As a UNESCO World Heritage site, Stone Town boasts narrow, winding streets lined with towering stone buildings adorned with beautifully carved wooden doors, reflecting its rich history as a major trading hub.