Coa Valley lies in northeastern Portugal near the Douro River, in a landscape shaped by steep hills, schist cliffs, vineyards, olive groves, and almond trees. The area is best known for its open-air prehistoric rock engravings, spread across the banks of the Coa River and protected as a UNESCO World Heritage Site.

Cancún sits on the northeastern tip of Mexico’s Yucatán Peninsula, where the Caribbean Sea meets a narrow stretch of sand shaped by ancient Maya trade routes and modern development. While widely known as a resort destination, Cancún’s roots trace back to a quiet fishing area near important pre-Hispanic sites, with nearby Isla Mujeres and the mainland serving as part of a broader coastal network connected to inland Maya cities.

Huntington Beach, California, famously known as “Surf City USA,” is a paradise for beachgoers and surf enthusiasts alike. With over 10 miles of pristine coastline, the city offers a perfect blend of natural beauty and vibrant coastal culture. The Huntington Beach Pier, one of the longest on the West Coast, is an iconic spot for visitors to watch surfers ride the waves or catch a breathtaking sunset.

Mamora Bay, tucked into Antigua’s southern coastline, is a serene crescent-shaped bay framed by gentle hills and swaying palms. Known for its calm, sheltered waters, the bay offers a tranquil setting that contrasts with the island’s more rugged Atlantic side.

Kẻ Bàng National Park lies in central Vietnam, near the border with Laos, and is known for its vast network of limestone mountains and underground rivers. The park forms part of one of the oldest karst landscapes in Asia, shaped over millions of years into a maze of caves, cliffs, and dense forest. Among its most famous features is Sơn Đoòng Cave, recognized as the largest cave on Earth, with sections so vast that clouds can form inside and a jungle grows beneath its collapsed roof.