I have never been to the Louisville Mega Cavern, one of Kentucky's most popular tourist attractions.

It transforms throughout the year for different occasions, but Christmas time is when it really lights up.

And I mean that quite literally.

For the holiday season, Louisville Mega Cavern becomes Lights Under Louisville, an exciting driving tour of lights under Derby City.

While you're on your 30 minute tour, you'll experience more than 850 lit characters that feature over 3 million points of light.

And the rules are pretty simple:

Turn off your headlights, don't stop, stay in your vehicle, don't exceed idle speed, stay on the route, and no smoking.

However, you can take all the photos you want.