Eldorado Canyon and Techatticup Mine Tour from Las Vegas. Step back in time to Southern Nevada's mining days on this trip to Eldorado Canyon from Las Vegas. See Techatticup, the area’s richest and oldest gold mine and explore the surrounding canyon where you’ll view historic artifacts. Stop at both the Hoover Dam and Nelson Overlooks and view the Colorado River. Unlimited bottled water, snacks, entry fees and hotel pickup and drop-off are included. Book and Save 9%: Eldorado Canyon and Techatticup Mine Tour from Las Vegas.