This is the 445th most frequent German word.
solche
"Solche" means "such" or "such (as)" in English.
The word 'solche' is used here as a plural demonstrative pronoun modifying 'Länder' to specify a type or category of countries possessing certain characteristics.
Solche Länder habe ich noch nie besucht.
I have never visited such countries.
In this sentence, 'solchen' acts as a plural adjective modifying 'Leute', used to express a specific subset of people associated with certain qualities.
Ich möchte nicht mit solchen Leuten sprechen.
I don't want to talk to such people.
Here, 'solche' describes 'Momente', emphasizing a characteristic group of moments that stand out in a positive way.