Going by the dictionary, a boardwalk is a path typically made of wood, which runs alongside a waterfront, and often serves as a promenade. But many natural reserves and parks are using the boardwalk concept to create short walking trails through deep forests and over bogs and marshes. People who are not likely to walk across great distances or uneven grounds find these paths a convenient way to explore the natural world. Here are 10 boardwalks around the world which let you explore nature's wonders up close. And two of them are in India.