Prague Subway:MetroLines: A (Green), B (Yellow), C (Red)Frequency: Trains run from 5 a.m. till midnight in 2-3 min. intervals during peak hours and in 4-10 min. intervals in the off hours.Trivia: The Prague Metro is about 30 years old and is mostly Russian built. Therefore, many of the stations have beautifully decorated floors and walls. … Continue reading Subways for Dummies: A Sampling of Underground Transportation