The Church exhumed the remains so although the tunnels are amazing and ripe with history the wow factor is greatly reduced. The people who built these are truly amazing. What a terrible time in history. Bring a bottle of water or two for when the parties form up outside under the sun. The underground is surprisingly cool around 60 degrees. We went early before the crowds had any real chance of forming. So people still had remnants of humanity. The experience was pleasant and eye opening overall.