This is the 235th most frequent Hungarian word.
budapesten
"Budapesten" means "in Budapest" in English.
The word 'Budapesten' here indicates location, specifying that the famous buildings are in Budapest.
Budapesten sok híres épület található.
In Budapest, there are many famous buildings.
'Budapesten' is used here to specify where the vacation took place—the location is Budapest.
A múlt nyáron Budapesten nyaraltunk.
Last summer we vacationed in Budapest.
In this sentence, 'Budapesten' serves to describe the place where the coffee was consumed—Budapest.