Concept:
Guna Caves are a famous tourist attraction located in Kodaikanal, Tamil Nadu. These caves were earlier called ``Devil's Kitchen'' because of their mysterious deep rock formations and dark passages.
• Located in Kodaikanal
• Known for unique pillar-shaped rocks
• Renamed after the Tamil movie ``Guna''
Step 1: Understand why they are called Devil's Kitchen.
The caves have:
Dark, narrow and deep chambers
This created a mysterious appearance, giving them the name:
Devil's Kitchen
Step 2: Identify the modern name.
After the release of the Tamil movie Guna (1991), these caves became popularly known as:
Guna Caves
Step 3: Eliminate incorrect options.
• Bhimbetka -- prehistoric rock shelters
• Belum -- longest cave system in India
• Ajanta -- Buddhist cave monuments
• Guna Caves -- Devil's Kitchen
Step 4: Final conclusion.
Hence, the correct answer is:
\[
\boxed{\text{Guna Caves}}
\]