Successfully completed the task! I found and added Amsterdam's highest rated activity to my wish list on GetYourGuide.com.

**Activity Added:**
- Name: Amsterdam: Guided Red Light District Tour in a Small Group
- Rating: 4.9/5 stars (from 7,662 reviews)
- Provider: Amsterdamliebe
- Status: Top rated ✓
- Price: €23 per person (discounted from €26)
- Duration: 1.5 hours
- Features: Free cancellation up to 24 hours in advance, Reserve now & pay later

The wishlist button confirms 'Added to wishlist' status, confirming successful completion of the task.