Gastown's famous steam-powered clock.

Halfway along Water St, this oddly popular tourist magnet lures the cameras with its tooting steam whistle. Built in 1977, the clock's mechanism is actually driven by electricity; only the pipes on top are steam fueled (reveal that to the patiently waiting tourists and you might cause a riot). It sounds every 15 minutes, and marks each hour with little whistling symphonies.

Once you have taken the required photo, spend time exploring the rest of brick-cobbled Water St. One of Vancouver's most historic thoroughfares, its well-preserved heritage buildings contain shops, galleries and resto-bars. Be sure to cast your gaze above entrance level for cool architectural features, including statuary faces.