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.

Lisbon, the enchanting capital of Portugal, entices sightseers with its vibrant color, stunning Gothic architecture, and temperate weather. Easily traversed by foot or tram, the city’s distinct quarters and vivid cultural landmarks make Lisbon an excellent spot for exploration.

Lyttelton is the largest settlement on Lyttelton Harbour, an inlet on the northwestern side of Banks Peninsula, and provides a frequent landing spot to those who are Christchurch bound.

Providenciales, often called “Provo,” is the most developed island in the Turks and Caicos archipelago and a gateway to some of the clearest waters in the Caribbean. Its coastline is famous for long stretches of white sand and shallow turquoise seas that seem to shift color with the sun. Grace Bay Beach, the island’s most celebrated shoreline, runs uninterrupted for more than 19 kilometers and is consistently ranked among the best beaches in the world.

Hvar is a resort town and island off the coast of Croatia. A tourist destination with spectacular views of the Adriatic Sea, Hvar is popular for its beaches and is a favorite port for yacht cruises.