Teleporting Players Building Concept

TELEPORTING PLAYERS
BUILDING
IN
MINECRAFT

Hello and thank you for checking out my map. I have created a a pair of building; one smaller than the other. The idea is that you enter the smaller of the two (realizing that it is a small building) and get teleported to a larger building. This is suppose to create the effect of walking into what seems like a small building, but in reality, the inside is bigger.

I have seen this in Harry Potter and the Goblet of Fire (And others) when the Weasleys go to the Quidditch World Cup. Their tent seems very small from the outside, but is actually a lot larger on the inside.