1. The BTS Skytrain is an elevated rapid transit system that operates in Bangkok, Thailand. It serves the densely populated areas of Bangkok and extends to other areas surrounding the city. It was opened in 1999 and currently covers around 49.8 kilometers of tracks with 43 stations. One interesting fact is that the BTS Skytrain is one of the fastest ways to get around Bangkok and also provides a scenic view of the city from above.

2. The BTS Skytrain usually operates from 6 am to midnight daily. Some stations may have different operating hours, and it is best to check the official website or contact BTS customer service for more information. The official hotline for BTS Skytrain customer service is 0-2617-6000.

3. The ticketing system for the BTS Skytrain is divided into two main types: single-trip tickets and stored value cards. Single-trip tickets are valid for one journey only and have to be used on the same day of purchase. Stored value cards are re-usable and can be topped up with credit. The BTS Skytrain also offers discounts for students and senior citizens. The fares are based on the distance travelled, and passengers can check the fare information on the official BTS Skytrain website.