Andrassy utca
by draguza
This very long street is called the "Hungarian Champs Elyses" as it was built taking inspiration from the famous Parisian avenue. In Pest, arguably the most important sight is Andrássy út.ca Along this streets you can find large shops and flats built close together. Between there and Heroes’ Square the houses are detached and altogether grander
The Danube
by acemj
The city is built along a graceful curve in the Danube River, which separates Buda and Pest. The river is wide, slow and slightly murky, but it looks great in photos. It's been of vital economic importance in not only the history of Budapest, but also of cities like Vienna, Bratislava and Belgrade. In fact, one thing I wish I would have had time for is taking a cruise up the Danube into Vienna. Maybe next time.
Monument to .... Number Zero?
by diocletianvs
Right in front of the entrance to Buda Tunnel there is a monument to - number Zero! (I told you Budapest is full of various monuments).
Apparently, this is the zero point in Budapest from which all the road distances to other towns in Hungary are measured from.
Citadel by foot
by gal_flower
Climb to the citadel by starting at the "Szabadsag hid" (the huge green metal bridge over donaube)
This part of the hill is more for locals, but it's a great place for a walk and climb to the hill.
Also you have a great view on Pest side of the city :)
See the city from a distance
by tiganeasca
You should try to get to one of two (or perhaps both) terrific vantage points from which to see the city. My personal preference is to visit the Fisherman's Bastion (Halászbástya) during the day and Gellert Hill at night. Fisherman's Bastion is on the Buda side of the Danube, perched on the edge of the cliffs overlooking Pest, a stone's throw from Matthias Church (Mátyás Templom). You get a stunning panoramic view of the Danube and Pest, including the Chain Bridge and the Parliament. (Don't forget your wide lens if you're a photographer.) At night, Gellért Hill (also on the Buda side) rises around 750 feet (230 m) above the river but offers the incomparable view of the entire city--which, as my poor photograph shows--can be spectacular.