1. The Caves of Drach are one of the most popular tourist attractions on the island of Mallorca, Spain. They are a series of underground caves formed by the action of water over thousands of years. The caves are known for their stunning underground lakes, stalactites, and stalagmites. The largest lake is called Lake Martel, and it is considered one of the largest underground lakes in the world. Visitors to the caves can take a guided tour through the caves, which takes around one hour.

2. The Caves of Drach are open daily from 10 am to 5 pm. The contact phone number is +34 971 820 753.

3. Tickets to the Caves of Drach can be purchased at the entrance or online through their website. The price of admission is around 15 euros for adults and 8 euros for children. The caves are located in the town of Porto Cristo, and can be easily reached by car or bus. There is a parking lot available for visitors.