the dead dunes in lithuania's curonian spit, featuring vast sand dunes with sparse greenery under a cloudy, overcast sky

dead dunes curonian spit sand sparse vegetation grasses overcast sky dramatic serene natural beauty geographical significance landscape nature outdoor environment scenic picturesque autumn forest contrast tranquility unique lithuania unesco world heritage baltic sea lagoon coastal seasonal travel tourism exploration wilderness setting activity hiking view wonder ecological conservation protected area site 39aph39 featuring vast greenery cloudy