Context: This was to go up to the Heights of Abraham on a cable car . We then went straight into the Coffee Shop which was surprisingly smart with a good selection of food and pleasant service . Next to Cave 1 , where we did a 30 minute guided tour , having looked at small exhibition first . On emerging onto a hillside with good view of Riber Castle on other side of valley , we walked down to a second cave where we did another 30 minute guided tour .

Question: Why did they do the guided tours of the caves ?
Options:
0. Because they were at Heights of Abraham .
1. Because they were near a coffee shop .
2. Because they were exactly 30 minutes .
3. Because they were curious about what was inside of them .
Answer: 3