… a door considerably smaller than other doors, found on metro platforms across Madrid. 

Behind it lies a world that has existed for exactly 100 years. Some call it the metro system, but that just refers to the part we can see with our eyes. Beyond it exists the other level, a secret network of time-bending tunnels taking you to a part of the Iberian Peninsula I’ve never dared take you…

But, before you glide through the other turnstiles, you must first show the Trapdoor Controller your ticket. It contains the secret password, written in invisible ink at the bottom, which you need special access to reveal…

Ticket and password ready?

The floor is rumbling and the trapdoor is creaking open… Welcome aboard, let the adventure begin!

Don’t have a Ticket yet?

Get your Ticket over here and I’ll meet you in front of the trapdoor.