This is the 3370th most frequent Polish word.
wspaniałych
"Wonderful" or "excellent" (plural form).
In this sentence, 'wspaniałych' functions as an adjective (in accusative plural form) modifying 'gości' (guests).
Otrzymaliśmy wspaniałych gości dzisiaj.
We received wonderful guests today.
Here, 'wspaniałych' is an adjective (in genitive plural form) qualifying 'krajobrazów' (landscapes).
Podziwiam piękne widoki wspaniałych krajobrazów.
I admire the beautiful views of wonderful landscapes.
The word 'wspaniałych' is used as an adjective (in genitive plural form) describing 'wydarzeń' (events).