Arrive in Thailand's capital, the lively metropolis of Bangkok. The bustling street life of this energetic city is set to a backdrop of colourful, ornate shrines and modern glass-fronted high-rises, which jostle for position to dominate the city's skyline. It's a place where old meets new at every corner. Sample the fresh and tasty street food, haggle in the non-stop markets and take a cruise out on Chao Phraya River to witness stunning sunsets. For those arriving on time our Leader plans to meet you in the hotel reception at 1pm for the welcome meeting and for those that wish, there is an optional longtail canal trip which cruises along the city's Khlongs to explore the city from Bangkok's network of backwaters that branch off the Chao Phraya River. The excursion will also include visits to Wat Arun, the Royal Barge Museum and the Temple of the Dawn, built to represent the towering slopes of Mount Meru - the Khmer's mythical home of the gods. If you would like an airport transfer today, you'll need to arrive into Suvarnabhumi Airport (BKK), which is one hour from our hotel. Please note that if you wish to join the Optional Longtail Canal Trip today, you must arrive at the hotel by 1pm. If you are booking your own flights, we recommend giving yourself at least one hour to clear the airport. From the airport to the hotel is around one hours' drive, so therefore the latest your flight can arrive is 10am.

This morning we make an early start with a train ride before boarding a scheduled bus service to the Cambodian city of Siem Reap. Operated as a through service, travellers will nevertheless change vehicles once in Cambodia. Your Thai leader will accompany you to the border and you will then meet your Cambodian Tour leader to continue your journey by local bus to Siem Reap.

Today is left free to explore the incredible jungle temple complex of the Angkor period, whose history covers some 600 years, from the 9th through to the 15th centuries. No activities or excursions have been included in Siem Reap and your time here is very much your own, although your tour leader will be more than happy to help organise any visits that you wish. Two of the best ways to explore are by bicycle or striking a deal with one of the many tuk tuks that ply their trade here. Obvious choices are the magnificent complex of Angkor Wat, without doubt one of the most incredible of the jungle sites, the fortified city of Angkor Thom (home to the Bayon, with its mysterious giant faces) and the wonderfully overgrown and atmospheric Ta Prohm, set amidst tangled tree roots and lush jungle and famous as the setting for some of the Lara Croft film Tomb Raider. Other possibilities include taking to the waters of the Roluos River, to visit the floating villages and local wat at Kompong Phluk and explore the flooded forest and great lake of Tonle Sap (the largest freshwater lake in SE Asia, covering nearly a seventh of Cambodia's entire landmass). Those wishing to gain a little understanding of Cambodia's more recent past might like to seek out the fascinating Landmine Museum just to the south of Banteay Srei Temple. Set up in 1997 by a former Khmer Rouge soldier, the museum offers support for countless victims of landmines, as well as providing visitors with a poignant reminder of one of the country's most violent and tragic periods.

Today is left free to explore the incredible jungle temple complex of Angkor.

Today we travel by public bus from Siem Reap onto Battambong, a journey of approximately 3 hours. Battambong lies along a route that has seen countless Thai and the Khmer Rouge soldiers wind their way north and south, either in the pursuit of conquest, or in the case of the Khmer Rouge to escape the invading Vietnamese in 1979. The town is, surprisingly, Cambodia's second largest, a factor that has done little to detract from its laid-back feel, enhanced by a wealth of colonial villas and leafy streets. Depending upon our arrival time there may be an opportunity to explore this afternoon, taking in its traditional temples and French-colonial architecture.

A public bus takes us on to the Cambodian capital this morning, the 6-hour journey getting us to the city in time for an afternoon's orientation tour. Phnom Penh sits at the confluence of the Sap, Mekong and Bassac Rivers, a charming testament to the country's ancient and colonial past, with tree lined boulevards and colonial villas dotted amongst the reminders of its turbulent history. The Cambodian capital since the mid 15th century, Phnom Penh's origins lie in the legend of 4 statues of Buddha, washed on the shores of the Mekong and discovered by a woman named Penh, which were later housed in the 14th century Wat Phnom, located on a small hill at the northern end of the city. On arrival there should be time to freshen up, after which you may join your tour leader on a short walking tour of the city.

Today has been left free for you to continue exploring this fascinating city at your own pace. Options include the National Museum, with its impressive collection of Angkor statues and the impressive French built Royal Palace, whose spectacular pagoda style structure is without doubt one of Phnom Penh's most impressive sights. A replica of King Norodom's old wooden palace, the building presents an ostentatious display of elaborate Khmer architecture, with golden nagas, orange, sapphire and green tiles and scenes from the Ramayana painted on the ceiling. The Tuol Sleng Genocide Museum and the 'Killing Fields' of Choeung Ek provide gruesome testaments to life under the Khmer Rouge and Pol Pot, the skull filled glass tower a vivid memorial to the 17,000 men, women and children who were murdered there between 1975-1978. You should be aware that by their very nature Tuol Sleng and the 'Killing Fields' can be a distressing experience for some people. You might like to take a trip along the Mekong, or perhaps visit some of the capital's numerous markets, such as the old Russian Market of Psar Toul Tom Poung, renowned for its textiles, jewellery and antiques. Of course you may just prefer to wander Phnom Penh's vibrant streets, soaking up the atmosphere and perhaps enjoying a drink in one of the city's old colonial riverfront bars.

Transferring to the bus station this morning, we catch the non-stop public bus to Ho Chi Minh City, an unescorted journey of some 6.5 hours that gets into the city in time to meet up with our Vietnamese tour leader. We cross the border at Bavet (Cambodia) and Moc Bai (Vietnam). Lying to the north of the Mekong Delta, on the banks of the Saigon River and still unofficially referred to as 'Saigon', the city today is the largest in Vietnam, an eclectic mix of the traditional and the new, where pagodas and markets compete alongside the trappings of Vietnam's newly discovered entrepreneurial spirit. Depending upon our arrival time we plan to make a short orientation tour on foot around the city, taking in some of its more obvious highlights, including the prominent Hotel de Ville, whose ornate grandeur is today the home of the city's People's Committee, as well as the Romanesque Notre Dame Cathedral and the impressive French style edifice that is the GPO building (should our arrival time render this option impossible, then we will do the tour tomorrow morning instead).

Today is free for you to choose from a number of options. You may wish to visit the remarkable Reunification Palace and the emotive War Remnants Museum, which contains a fascinating, and at times chilling reminder of the cost of what the Vietnamese refer to as the American War. Or perhaps browse the bustling stalls of the Binh Tay Market, the largest wholesale market in southern Vietnam and a fabulous place to stroll and meet the locals.

The trip ends after breakfast at our hotel in Ho Chi Minh. There are no activities planned today, so you are free to depart from Ho Chi Minh at any time. If your flight is departing later in the day luggage storage facilities are available at our hotel. If you would like an airport transfer today, you need to depart from Tan Son Nat International Airport (SGN), which is 30 minutes from the airport. If you have time you may wish to take an excursion further afield to the infamous Cu Chi Tunnels. Originally started during the French occupation of the country, the tunnels went on to achieve notoriety during the Vietnam War, when they formed an incredible underground command base for 10,000 Viet Cong troops and were a major part of the Tet Offensive.