Visit
Little train
Through the chalk cellars

Mercier is a Champagne house in Epernay whose cellar tour the source recommends above the more famous Moët & Chandon visit (source: Epernay - Top 5 things to do.md).
The tour itself is the draw: you travel around the cellar on a little train through the chalk galleries, then go upstairs where a sommelier hosts a guided tasting (source: Epernay - Top 5 things to do.md).








The source's clear top pick among Épernay's house tours — the little train and the sommelier tasting make it more of an experience than the bigger names.
Take this one over Moët.