gg5: 印象的な光景　an impressive [a striking] scene.
m-w (impressive): "making or tending to make a marked impression : having the power to excite attention, awe, or admiration"

Although "impressive" isn't always used with the same meaning as 印象的, it's still a valid translation.

@@ -16,0 +17,2 @@
+<gloss>striking</gloss>
+<gloss>memorable</gloss>

"Impressive" means "worthy of surprise or commendation" in contemporary US English, and this is different from the meaning of 印象的 ("impression-leaving"). I found 
it hard to think up the right adjective for this ("impactful") until now, and I believe it should be added to the entry.

@@ -16,0 +17 @@
+<gloss>impactful</gloss>