There is a very interesting-looking little building in the middle of the Main Square. It’s a hundred year old industrial monument that has been renovated in 2015 and became the smallest café of Budapest. Serving specialty-coffee only at 4 square meters in a unique looking monument attracts visitors from all over the city. Even professional designers noticed the unique looking café and Gaslight Kiosk became the”best pop-up terrace” of Budapest in 2016.