The Certificate of Excellence accounts for the quality, quantity and recency of reviews submitted by travelers on TripAdvisor over a 12-month period. To qualify, a business must maintain an overall TripAdvisor bubble rating of at least four out of five, have a minimum number of reviews and must have been listed on TripAdvisor for at least 12 months. – See more at:

Travelers have spoken: 2017 Certificate of Excellence

Norwegian Petroleum Museum reviews