Where can you find these red-colored wetlands?

Wetlands exist in many kinds of climates, on every continent except Antarctica. They vary in size from isolated prairie potholes to huge salt marshes. They are found along coasts and inland. Some wetlands are flooded woodlands, full of trees

These red-colored wetlands can be found along the coast of the Red Sea in China, specifically, on the Panjin Beach.

Explanation:

The Panjin Beach in China is known for its varied appearance all throughout the year. It is situated on the delta of the Liaohe River which allows it to be categorized into a wetland. This beach is characterized by its wetland shore that is covered in a genus of a plant named 'Suaeda'. This plant exhibits different colors in different seasons. In the late summer, it turns red giving the entire wetland a red appearance.