Cat Ba, the largest island in Vietnam’s Halong Bay, is a striking mix of rugged limestone cliffs, hidden coves, and vibrant jungle. Long home to fishing communities, the island has retained its local charm while also becoming a gateway to the natural wonders of the surrounding bay.

Nyungwe Forest National Park, in southwestern Rwanda, is one of Africa’s oldest rainforests and a sanctuary of biodiversity. Spanning more than 1,000 square kilometers, the park shelters a wealth of wildlife, including over 300 bird species, 1,000 plant species, and an impressive 13 primate species.

Gibraltar is located in southern tip of Spain, on a tiny peninsula. It is governed by the British and named after the Rock of Gibraltar, which is located on its east side. The territory is mainly used as a shipping port, and a port-of-call for cruise ships.

Valley of Fire State Park lies in southern Nevada, northeast of Las Vegas, where more than 40,000 acres of red sandstone formations rise from a desert landscape of limestone hills and broad valleys. The park is Nevada’s largest state park and is named for the fiery appearance of its sandstone when sunlight strikes the rock. Wind and water have shaped the landscape into arches, narrow passages, domes, and ridges in shades of red, orange, tan, pink, and white.

Robe is a small coastal town on South Australia’s Limestone Coast, overlooking Guichen Bay between long beaches, low dunes, lakes, and rocky headlands. Its setting combines a working fishing community with a historic town center containing numerous heritage-listed buildings. Robe developed as a port serving the pastoral districts of the southeast, and its maritime character remains visible around the harbor and waterfront.