Explanation:

- The Vittala Temple in Karnataka is indeed the most extravagant architectural showpiece of Hampi.

- Akshardham Temple: Located in Delhi, it is known for its spiritual and cultural significance, but not related to Hampi.

- Lingaraj Temple: Situated in Bhubaneswar, Odisha, it is a notable example of the Kalinga architectural style.

- Vittala Temple: Famous for its intricate carvings, musical pillars, and iconic stone chariot, it stands as a glorious example of Vijayanagara architecture.

- Meenakshi Temple: Found in Madurai, Tamil Nadu, known for its striking gopurams but unrelated to Hampi.