@insightvacations: This might be the most unexpected location for an art gallery 👀 Hidden beneath the streets of Stockholm the Stockholm Metro is considered the world's longest art gallery 🎨 Artists have transformed over 90 stations with mosaics, paintings, sculptures, and raw bedrock carvings... You can explore for yourself when you join us in Stockholm on our 'Northern Capitals' premium guided tour 🇸🇪 #traveltok #traveltiktok #travel #stockholm #sweden