1. Laguna Grande is a bioluminescent bay located in Fajardo, Puerto Rico. The bay is home to microorganisms called dinoflagellates which emit light when agitated. This creates a natural phenomenon called bioluminescence, where the water glows a bright blue at night. The bay is only accessible by kayak or boat due to conservation efforts to protect the delicate ecosystem. Visitors can take guided tours to see the bioluminescence up close and learn about the history and ecology of the area.

2. The working hours and contact information may vary depending on the tour company. It is best to check with the specific tour company for their hours of operation and contact information.

3. Tickets for guided tours to Laguna Grande can be purchased through various tour companies in Fajardo. Prices may vary, but generally range from $50 to $100 per person. Transportation to the bay is usually included in the tour. It is recommended to book in advance as tours can fill up quickly.