1. The Bridge on the River Kwai is a famous bridge located in Kanchanaburi, about two hours away from Bangkok. The bridge was originally built during World War II by Allied prisoners of war under Japanese supervision, as part of the Burma Railway. It spans the River Kwai Yai and the surrounding lush greenery makes for a beautiful sight. The bridge was immortalized in the movie \"The Bridge on the River Kwai\" which was filmed on location and went on to win seven Oscars in 1958.

2. The Bridge on the River Kwai in Kanchanaburi is open every day from 6:00am to 6:00pm. There is no official phone number available for the bridge, but you can contact Kanchanaburi Tourism Information Center at +66 34 511 047 for more information.

3. There is no admission fee to visit the bridge. However, you will have to pay a fee if you wish to cross the bridge by train. The fee for a one-way train ride over the bridge starts at 100 baht (approximately $3 USD) but may vary depending on the time of year and the train schedule. You can also reach the bridge by taking a bus or hiring a taxi from Kanchanaburi town. Buses depart from the Kanchanaburi Bus Station and the fare is approximately 50 baht (approximately $1.50 USD) per person. Taxis are also available but it is recommended that you negotiate the price beforehand.