Describe 10 lesser-known cultural highlights in European cities that travelers can discover off the beaten tourist paths to enjoy authentic experiences and local atmosphere.

Context: [city trips, culture, insider tips, local experiences, sights, European cities, authentic tourism, cultural sites, history, insider knowledge]

Goal: [unique travel experiences, less crowded places, deeper cultural insights, sustainable travel, promotion of local culture]

For each tip explain:
1) a specific sight, event, or cultural activity away from the well-known tourist attractions
2) practical information on arrival, visiting times, or special experiences on site
3) the expected added value for an authentic and enriching travel experience

The tips should:
- be suitable for culturally interested travelers of all experience levels
- cover various European cities and regions
- include highlights from art, history, music, culinary culture, or traditional crafts
- motivate sustainable and conscious travel planning