Can you imagine Lexa and Clarke, just talking a walk, Lexa showing Clarke all the flowers, their significance, wich ones are used to "heal". They don't have to hold hands, it's a time to relax, leaving all the noise of Polis behind. Maybe they walk near a waterfall? Lexa tells her "The water is cold, if you decide to go in, be careful". It doesn't even have to be romantic, just them, learning about each other.