Ruby Falls is a high underground waterfall located within Lookout Mountain, near Chattanooga, Tennessee in the United States. - Ruby Falls and the larger Lookout Mountain Caverns complex have been designated a National Historic Landmark.
"The Flatiron Building (or Fuller Building, as it was originally called) is located at 175 Fifth Avenue in the borough of Manhattan, New York City and is considered to be a groundbreaking skyscraper…" photo: Trey Ratcliff on stuckincustoms
The San Francisco cable car system is the world's last manually operated cable car system. An icon of San Francisco, the cable car system forms part of the intermodal urban transport network operated by the San Francisco Municipal Railway.