If you are looking for a fun, cheap and easy way of taking in lots of the sights of Budapest you may consider using Budapest Metro Line 1 as your guide and going on a metro line inspired sightseeing tour.
There are currently three metro lines in Budapest and the M1 line is one of the best for taking in some of the major sights of Budapest.
Opera (Budapest Metro Line 1)
You can buy single metro tickets for 300HUF each (or a book of ten for 3000HUF) or with a Budapest Card you are able to use the Budapest public transport system free.
A Sightseeing Tour on Budapest Metro Line 1
The following table lists all the stations on Budapest Metro Line 1 and the best tourist attractions near them.