Yes.
Nevada Test Site is the massive outdoor laboratory that, from 1951 to 1992, was used to conduct nuclear-weapons testing, both above and below ground.
While it’s also located on restricted access government property about 65 miles northwest of Las Vegas along US 95, free general-interest tours of the Test Site are available, conducted by the U.S. Department of Energy through the National Nuclear Security Administration Nevada Site Office.
The tours take place once a month and you can see the complete schedule for the upcoming year or so at the tour website. They sell out very quickly; at this time, the 2017 tours are completely full.
But here's the relevant info.
The minimum age for tour guests is 14 and pregnant women are discouraged from participating, as the bus ride out there is long and covers uneven terrain.
All visitors must apply for security clearance at least six weeks in advance of taking the tour by providing the DOE with name, date and place of birth, home and business address, employer name, home and business phone number, and citizenship. Foreign nationals need to supply additional information and should allow considerably longer for their application to be processed.
The chartered bus departs from the Atomic Testing Museum (755 E. Flamingo Road) at 7:30 a.m. and returns at 4 p.m. You’re encouraged to bring your own food and drinks as there’s no stop for lunch. No alcoholic beverages are permitted. Casual dress is recommended, but shorts and sandals are not allowed.
Once you’re out there, points of interest on the tour include Mercury (the main base camp), Frenchman Flat (site of the first atmospheric nuclear test on January 27, 1951, and 13 subsequent tests ), Nonproliferation Test and Evalutation Complex, Low-Level Radioactive Waste Management Site, Control Point-1 (nuclear testing command post), News Nob (the vantage point from which journalists and visiting dignitaries would witness the tests), and Sedan (a cratering experiment that was part of the Plowshare program, investigating peaceful uses of nuclear explosions).
Here's a note from someone who took the tour.
"Just a quick note about the Atomic Test Site Tour. We took it last year [2007] and although fascinating, I'm not sure I would recommend it heartily. It was an all-day event and since no cameras are allowed, you could not record your visit or some of the fascinating features of the tour. (The Sedan crater was really cool to look at. It was an attempt to use atomic weapons for excavation purposes. It turned out to be a not-so-good idea with radiation and all.)
"All things being equal, I would recommend the Atomic Museum over the tour, especially if your time in Vegas is limited."