On the Kanawha River, Charleston, West Virginia ?
Borneo Rainforest Canopy Walkway.
WHITE PASS AND YUKON ROUTE Scenic Railroad - Skagway, Alaska - . The WP&YR; climbs almost 3000 feet in just 20 miles and features steep grades of up to 3.9%, cliff-hanging turns of 16 degrees, two tunnels and numerous bridges and trestles. Built in 1898 during the Klondike Gold Rush, this narrow gauge railroad is an International Historic Civil Engineering Landmark, a designation shared with the Panama Canal, the Eiffel Tower and the Statue of Liberty. The WP&YR; railway was considered an impossible task but it was literally blasted through coastal mountains in only 26 months.