It’s not every day you get to see how a city changes, is it? This weekend Prague’s transport company is offering you the chance to dive deep into the new metro D line and walk through the tunnels they’re excavating under our feet. You must register in advance for this opportunity of a lifetime!

The entrance is a construction site on the corner of Antala Staška and Na Strži streets. Make sure to wear appropriate footwear, and remember that it will be cold underground.