Like a baby book, the Grand Canyon’s strata document Earth’s development, from its first bout of volcanic tears to the time it ate all the birthday cake. Observe geological growing pains with today's Groupon: for $79, you get a Grand Canyon Express West Rim tour from Comedy on Deck Tours (a $160 value, including tax).

The knowledgeable guides at Comedy on Deck Tours whisk visitors to the Grand Canyon’s scenic West Rim on daylong sojourns. Fueled by an included breakfast of a danish, juice, water, and the jabs of a comedic leader, sightseers flock to the canyon on an interactive express tour inside refurbished air-conditioned buses. Along the way, eyeballs can ogle such landmarks as the Hoover Dam bypass bridge and a Hualapai tribal village. At the canyon, trekkers have three hours to explore the West Rim and its awe-inspiring views, including the eagle-shaped rock formation at Eagle Point, the guano mines at Guano Point, and the Sky Walk, which tempts daredevils with a glass floor more than 4,000 feet above the Colorado River. The bus then departs for the return journey, arriving back in Vegas by 4 p.m.

Pickup points are available at the Golden Nugget, Stratosphere, Circus Circus, Treasure Island, Bally’s, Monte Carlo resort and casino, and Excalibur. Reservations are required to ensure that the bus arrives at the pickup location you choose.