[Columbine]

I like the Keihan line that runs from Osaka to Kyoto. Admittedly, most for the nostalgia value as it was the one I used most when i lived here before, but considering it goes from downtown Osaka to downtown Kyoto via a good number of places (tofukuji, gion, pontocho, fushimi-inari etc) its a good one to hop-on-hop-off and sightsee.