Koh Samui :
It is one of the best Thailand’s islands and I really love it. White sandy beaches, astonishing diving, some of the world's most excellent coral reefs and clear blue water make it a sea and a heaven.

Pattaya:
It has appealing beaches and temples. The night life there is also remarkable too. There is huge assortment of best quality clubs, bars and restaurants. I really enjoyed in those and had memorable time.

Best Regards,

Hi guys

Thailand's capital. Expect Bangkok to bowl you over. This dynamic and fascinating city, will affect all your senses. The smell of wonderful food cooked on the street... The noise of the traffic which fades in the peaceful tranquility of temple grounds... The gleaming spires of the Grand Palace and the city's many historic temples - The Emerald Buddha, Temple of Dawn and other evocative shrines, contrasting with the new glass and steel towers of business corporations and shopping malls... The famous floating markets... canal tours... and of course, the nightlife. The raunchy collection of girlie bars for which Bangkok is unjustifiably infamous, has given way to sophisticated music clubs, bars and restaurants catering to Bangkok's upwardly mobile.
While the traffic is still legendary, the introduction of the modern BTS Skytrain, has made getting around Bangkok very easy. With most of the popular areas within reach, Bangkok's capital city is definitely worth a visit...

Thanks for all friends
Have a nice day

Hello
1. Best time of the year to travel.

The best months to travel through Thailand are December and January. Second best are November and February. These months constitute the 'cold' seasons. In Bangkok temperatures are still as high as during a good West-European summer though. At night, it cools off a bit, and especially in the north of the country, it can be quite chilly, temperatures dropping below 10 degrees Celsius. In Bangkok, temperatures will rarely drop below 20 degrees Celsius, even at night.
From roughly March till May, Thailand experiences the hot season, when temperatures can soar into the 40 degrees range. Not the best time of year to go walking about cities or countryside.
From roughly May till October, we have the rainy season. It is quite unpredictable when it is going to rain though, and there are sometimes episodes of up to two months during this period, when there is no rain fall. Other years, rain falls more consistently almost every week. Traditionally rain falls during the late afternoon. It seldom lasts more than a few hours. Flooding of areas of Bangkok and in the provinces occurs, more at the end of the rainy season in Bangkok (the drains are more clogged by then). Temperatures tend to be high, but cool off somewhat each time it has rained.

2. Travel route. Where to go?

Personally, I prefer the culturally inspired holidays. So I would recommend going where there is something interesting to see and schedule your itinerary around those places of interest.
A route going up north from Bangkok to Chiangmai is rather 'classical' and a good start. Going up north from Bangkok, interesting places to visit are : Bangkok, Ayuthaya, Lopburi, Sukhothai, Sri Satchanalai, Chiang Mai. I have underlined the 'must see' places. To the west of Bangkok, Kanchanaburi may be of interest, especially to those who have still war memories. While the province may be of interest for those who have time and want to relax in a pleasant green environment, it does not warrant a great detour, if you are on a tight schedule. Close to Chiang Mai, Lamphun is worth a half-day trip. Chiang Rai should be rather optional, there is not much to be seen at the so called Golden Triangle. So again, depending on your time available, you may skip this area. Phitsanulok, in between Bangkok and Chiang Mai, can be a good base to visit Sukhothai and Sri Satchanalai. Sri Satchanalai was the sister city of Sukhothai during the Sukhothai kingdom, and has some interesting ruins, though not as extensive as the ones in Sukhothai itself. All the cities above are connected by bus routes. Day and nighttime trains go between Bangkok and Chiang Mai, go and stop in Phitsanulok, but do not go through Sukhothai.