These two funiculars, built in the late 19th century, are Pittsburgh icons, zipping up the steep slope of Mt Washington every five to 10 minutes. They provide commuters a quick connection and they give visitors great city views, especially at night. You can make a loop, going up one, walking along aptly named Grandview Ave (about 1 mile, or take bus 40) and coming down the other.
If you ride just one, make it the Duquesne (du-kane ). At the top, you can pay 50¢ to see the gears and cables at work. Outside the station, Altius restaurant is a good place to enjoy the view over a drink.