A tank that tall is just asking to be a palludarium...
Although, it will be kind of hard with it being as narrow as it is. - you would have to do a pretty minimalist backdrop, maybe thinned tree fern slabs, or slate, or something similar.
I agree on the potential for a paludarium.
The narrow width doesn't allow much earth or other hardscape above waterline, though.
But, my vision:
-filled in halfway with water (brackish)
-mangrove-like roots connecting the above with the below
-branches and perhaps some live vineing plant on top as a nice foliage canvas
-archer fish, some of the smaller species
-pointy light(s) to give a nice glimmer
Less is more.