Hot Springs, Arkansas has been drawing visitors for centuries, and it all starts with the water. The city sits atop a natural thermal spring system that produces nearly a million gallons of 143-degree water each day. These springs gave rise to Bathhouse Row, a stretch of eight historic bathhouses within Hot Springs National Park. Some, like the Fordyce Bathhouse, now serve as museums, while others still offer traditional thermal soaks.

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.

The ancient region of Cappadocia lies in Central Anatolia, between the cities of Nevsehir, Kayseri and Nigde. Here, the traveler finds one of the most fantastic landscapes in the world. Wind and weather have eroded the soft volcanic rock with hundreds of strangely shaped pillars, cones and "fairy chimneys", often very tall, and in every shade from pink through yellow to russet browns.

Salalah stands out with its rare blend of desert and tropical appeal. Unlike much of the Arabian Peninsula, this coastal city is transformed by the seasonal Khareef (monsoon), turning the landscape lush and green between June and September.

Tristan da Cunha is a remote volcanic island in the South Atlantic Ocean, forming part of a small archipelago along with Inaccessible Island and Nightingale Island. Known as the most isolated inhabited island in the world, it is accessible only by a week-long boat journey from South Africa.