Yes but:
....the mini Eifel Tower overlooking the city near the castle
Two nights is about right as the city centre is very compact and we became bored when we went for three nights.
You pay to go up the tower and it's not great.
However, the exhibition in the tower basement is priceless. And it's free in.
If you like music, you can get to 3 concerts a day and a different opera each evening.
Otherwise just as previous correspondant has suggested.
Theresienstadt (Terezin) concentration camp is less than an hour from Prague, and this sobering place is well worth a visit. It is a Napoleonic walled town taken over for the duration of WW2. It was a transit camp to Austwitz, so, in the duration of the war, only 13 people were executed there. However, over 39,000 died from neglect.
When I visited there around 6 years ago, I was shown the cell (In darkness)
where Gavrilo Princip died of tuberculosis in 1918. He was the man who shot dead the Archduke Ferdinand, thus triggering the Great War, and the subsequent WW2 after a breather to regroup.
I pointed my camera into the dark cell and took a flash photograph.
On looking later, I found a newly laid spray of flowers on his bed.
What hope is there for the Balkans when some people still think he is a hero?
Even Adolph recognised that Prague was the cultural centre of Europe, and he was going to make it the cultural centre of his Third Reich, but the tour was cut short by events so it never happened.
Myke