Hornblower (Canada) vs Maid of the Mist (US): Canadian side wins for rainbow photos at Horseshoe Falls

The Hornblower tour gives you a head-on approach to Horseshoe Falls with afternoon sun behind you, creating prime rainbow conditions. Maid of the Mist runs more parallel to the falls, so rainbows are smaller and harder to frame. For the classic shot of a big rainbow arcing across the base, go late afternoon from the Canadian boat.