While a chartered yacht is a comfortable way to tour the seas, it can only navigate city streets with the help of hundreds of unhappy pack goats. Tour Pittsburgh in terra firma style and comfort with today's Groupon: for $10, you get an adult all-day double-decker bus tour pass from The Pittsburgh Tour Company (a $20 value). Children under 10 are regularly $10 and children under 2 are free.

With its easy hop-on, hop-off system, The Pittsburgh Tour Company carts wide-eyed passengers through the city's cultural and architectural hallmarks aboard either an antique, brick-red double-decker tour bus from London named Martha or an open-top double-decker bus named Louise. As the bus weaves through bustling city streets, guests are free to disembark, explore the area, and reboard the tour at any of its nine stops, including Grant Street, Station Square, and North Shore. Must-see sights include the Mount Washington neighborhood, which offers exquisite views of downtown, the Carnegie Science Center, and the 14-block Cultural District, which is populated with seven world-class theaters and eight public parks. Roll into the Strip District to find the perfect pastry, or put on a poker face when entering the Rivers Casino. Onboard Martha, amicable, streetwise narrators spin tales that are rife with historical tidbits, witty asides, and directions on how to get to the log cabin where E.T. was born.

Buses begin departing at 10 a.m. from the home base at The Southside Works, with six departures throughout the day until the last departure at 6:45 p.m., although itinerant enthusiasts can call ahead to board at any stop on the bus's route. Round-trip tours usually last about 75 minutes.