Széll Kálmán tér (Széll Kálmán Square)
Considered by many to be the centre of Buda, it is one of the busiest transport interchanges in Budapest. The Metro station located under the Square, is on the M2 (East-West) line. It is currently the deepest station of the Budapest Metro and the escalator there is so long and steep as to easily induce vertigo.
These photos are taken from the stairs connecting the roadway to the square. Thanks go to Derek for pointing me at them.