Related Links: At Dig This, Ordinary Folks Test Their Skills in the Seat The newest Las Vegas Strip attraction isn't another mega-resort or Cirque du Soleil show. Rather, it is a heavy equipment playground that lets visitors operate life-size Tonka toys. “Dig This” is a construction theme park developed by New Zealand-born Ed Mumm, who stumbled upon the idea while using a rented excavator to build his home in Steamboat Springs, Colo. After a couple of days of digging, he realized that operating machinery was a blast. "I wasn't making much progress on the house, but I was having great time," Mumm
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.