Cambodia Tourist Destinations
Koh Kong
Koh Kong is the most southwestern province of Cambodia. It is one of the biggest provinces in the whole country with a long undeveloped coastline and a mountainous, forested and largely inaccessible interior, which embraces part of the Cardamom Mountains, the biggest coherent rainforest of Southeast Asia. Its tourist attractions include abundant wildlife; big waterfalls and casinos on the border to Thailand, while an Export Processing Zone and new port facilities are being developed for international trade.
The province is an increasingly popular gateway to Cambodia from Hat Lek in southern Thailand, in part of the reasonably direct access to the port and beach resort town of Sihanoukville. While this was previously a gruelling journey by boat and pickup on rough bumpy roads using small ferries at river crossings, the donation by the Thai government of new road infrastructure is improving access greatly.
The name means " Kong Island Province". Its capital is Krong Koh Kong, which is located in the West of the province right next to the Thai border. 
The city is surrounded with a large forested area connected to the mainland by bridges and ferries. It's generally a quiet town, but there are many reasons to stay in Koh Kong for more than one night such as the nearby islands, rivers, tours into the nature and the buzzing nightlife.
The people of Koh Kong speak mainly Khmer, and most speak some Thai as well. You can also find many Chinese and Vietnamese speakers as well as a lot of broken English. Your stay here will be economical as lodging, food and transportation is relatively cheap here. Please make this place a stop on your travels through S.E. Asia and you won't be disappointed.
How to Get There - Koh Kong
Border Crossing:
Koh Kong (Cambodia) /Hat Lek (Thai):
Open from 7:00 -17:00.
By Bus and Taxi:
It is always travelled by backpackers; there are many comfortable means of getting to Bangkok and Phnom Penh via Koh Kong.
Bangkok to Phnom Penh:
1.) Take a bus to Trat.
2.) Take a Songthaw to Klong Yai, takes 2 hours
3.) Change to another Songthaw to Hat Lek, about 30 min. Then cross the border. You can get the Cambodian 1-month arrival visa on the border. $20 or 1000 Bath. The visa application form requires 1 passport photo.
4.) Take a moto to Koh Kong
5.) Express boat to Sihanoukville, departure 8:00 am to catch up with the Express Boat in a same day, you have to leave Trat very early in the morning. Or take the minibus.
6.) In Sihanoukville, take a moto from the port to the bus station. If you want to travel to PP in a same day, you have to hurry to go to the bus station. You have to ask for the moto fee before, otherwise you are asked to pay a higher fee.
7.) Take a bus to PP, around 4 hours. It is possible to travel from Koh Kong to PP in a day. 
Note: Moto and boat fees have to negotiate before you enter them for travelling.
From Phnom Penh to Bangkok
Overland:
Bus: Capitol Bus departure 7:30 am
Bus + Boat:
1.) Take a bus from Phnom Penh to Sihanoukville. To catch up the boat in the same day, you have to take an early bus at 7:30 a.m.
2.) Take a moto from the bus station to the boat pier. Make sure you bargain for the moto fee.
3.) Take an express boat from Sihanoukville to Koh Kong. Departure: 12:00 noon. If you want to take the boat in a same day, it is not sure to get the seat as what you want but you can sit on the roof. Travel time around 3.5 hours.
4.) From Koh Kong to the Border: take a moto driver.
5.) Cross the border. The border is closed at 17:00.
6.) Take a Songthaw to Klong Yai, travel time around 30 min.
7.) Change songthaw to Trat, around 2 hours.
8.) From Trat to Bangkok, there is also a night bus departure.
Attention:
If the boat arrived later than 16:00, you have to take a risk not to be able to cross the border. In case the border is closed once you got there, you have 3 choices.
1) Stay at Eingdoy Hotel, 500m before the border, tel. 039-588109, room rate is around 10 to 15 USD per night with TV, Pool Bar.
2) A small Guest House in the village nearby, 1.5 km from the border. Experience the local home stay; room rate is around 5 to 8 USD per night.
3) Go back to Koh Kong town by moto or boat for only 1 USD per person.
Share Taxis:
You can also make the way from Phnom Penh to Koh Kong town in a share taxi. The departure is early in the morning around 7am opposite of the central bus station, where there are lots of minibuses and taxis waiting for customers. The ride will probably take around 8-10h depending on the season you are travelling. The price is negotiable between $14-20.
Motorbike Info:
If you would like to experience a very nice, but kind of rough route through a remote area of Cambodia, than it is that tour you will have to go for. You need to take the National Highway No 4 from Phnom Penh in direction of Sihanoukville. After heading on the Highway for around 180km you'll pass a small town called Kampong Seila, from which it is a couple of kilometres more to come to a T-junction. Now turning right you're entering the Minor Road No 48. It is a narrow road badly paved with laterite, which makes an adventure out of your trip. You should be well experienced to manage this bumpy, creek-crossing road during the wet season without tasting the ground. As the road led through a breathtaking countryside you'll reach Koh Kong after approx. 140km. Be sure that the early bird catches the worm so don't go to late as you want to manage the whole trip within one day.
Source: TourismCambodia.com
