Attracting everyone from budget backpackers to ostentatious oligarchs, Koh Samui is one of Thailand’s most popular islands. It’s no surprise, given the truly stunning beaches, but the more developed areas such as Chaweng have lost a lot of their charm, so head for the quieter south and west if you can.

Thailand’s sprawling capital is an assault on the senses, an invigorating blend of tradition and modernity. Soaring skyscrapers, air-conditioned shopping malls and an efficient public transport system combine with shimmering golden temples, ancient palaces, floating markets and at times gridlocked rush hour traffic.

The once sleepy backwater of Kompong Som, renamed after the former king Norodom Sihanouk, is the rising star of the Cambodian coast’s burgeoning tourist industry. Here you’ll find beautiful sandy beaches and a string of laid back islands that are still largely undeveloped.

Saigon, as it was known then, was the capital of the South during the Vietnam War, and American-style capitalism has been embraced more enthusiastically here than in the North, with a clutch of shining skyscrapers standing as testament to Vietnam’s surging economic growth.

Nha Trang is Vietnam’s premier beach destination, on a stunning bay dotted with idyllic islands. The main attraction is the laid back seaside atmosphere, but there are also a few noteworthy cultural sites, including the ancient Po Nagar Cham Towers, which were built between the 7th and 12th centuries.

The port of Chan May is close to a number of central Vietnam's star attractions. Just to the north lies Hue and its crumbling Imperial Citadel, a UNESCO World Heritage Site, while to the south is the city of Da Nang, a major US airbase during the Vietnam War, and pretty Hoi An, a dreamy tropical haze of teetering merchant houses, bustling markets and Chinese temples.

Wander along the perfumed streets of Hanoi’s atmospheric Old Quarter and you could almost forgive yourself for thinking you’d travelled back in time, were it not for the beeping, buzzing morass of motorcycles zipping past.

Hong Kong is a striking mix of ancient and modern, Chinese and British, and there is a lot more to the city than just skyscrapers and high finance. It's also a fantastic destination for foodies, a melting pot of culinary influences from around Asia and beyond.

Kaohsiung is Taiwan’s second largest city and one of the world’s largest container ports, situated on the south west coast of the island. Formerly a rather grim industrial centre, the city has been transformed in recent years, with new parks, cafés, galleries and museums popping up all over the place.

Keelung is a fairly unremarkable port city close to Taipei, Taiwan’s capital. Taipei draws on an interesting mix of Chinese, Japanese and Western influences, and is home to attractive temples, a burgeoning street food scene and Taipei 101, which was the world's tallest building until it was eclipsed by Dubai's Burj Khalifa in 2010.

Ishigaki is the most developed of the Yaeyama islands, an idyllic tropical archipelago located closer to Taiwan than mainland Japan. The offshore coral reefs make this a popular spot for diving and snorkelling, while the jungle interior offers some great hiking opportunities.

Naha is the capital of Okinawa prefecture, a subtropical region of southern Japan with its own distinct culture. The city is a bustling commercial centre despite being flattened during the Second World War, and the architectural highlight is the elegant Shuri Castle, a UNESCO World Heritage Site.

Booming Shanghai has long been China’s most outward-looking, cosmopolitan city, as evidenced by the fascinating mixture of European and Asian architecture. The Bund, a riverfront promenade flanked by grand colonial era buildings, is the city's most famous thoroughfare, while the Pudong financial district lights up the city skyline at night with its futuristic towers.

Three days after Hiroshima was flattened by an atomic bomb, Nagasaki suffered the same horrifying fate. The reconstruction of both cities has been quite extraordinary; Nagasaki today is a vibrant, cosmopolitan place, with a fascinating history that goes back a lot further than 1945.

Busan is South Korea’s second biggest city and one of the world’s busiest container ports, but it’s an easygoing place with a discernibly different character to Seoul. Haeundae beach is a popular summer holiday destination for Koreans, while the pungent Jagalchi market sells every type of fish and sea creature imaginable.

On 6 August 1945 the world witnessed the terrifying power of nuclear weapons for the first time, unleashed on the unsuspecting Japanese city of Hiroshima. The modern city's sobering Peace Memorial Park commemorates that fateful day, which left more than 140,000 dead.

The small, laid back city of Kochi is situated on the south coast of Shikoku island, an important place of pilgrimage for Japanese Buddhists. Three of the 88 temples on the pilgrimage route are in Kochi, and the city is also known for its elegant 17th century hilltop castle.

Small in size and cosmopolitan in its outlook, Kobe is a thoroughly pleasant city with a long and distinguished history as one of Japan’s main trading ports. Kobe’s past as a commercial hub is reflected in its architecture, with a number of unusually European-looking houses, as well as a charming, if slightly touristy, Chinatown.

Nagoya is Japan’s fourth largest city, though it remains well off the radar of most tourists, overshadowed by nearby Tokyo and Kyoto. The city is an important manufacturing hub, home to companies including Toyota and Lexus, and sights include a fascinating railway museum featuring maglev and ‘shinkansen’ bullet trains.

In a state of constant renewal and forever looking to the future, densely populated Tokyo is a dazzling introduction to Japan and its utterly unique culture. With more neon than Las Vegas and more Michelin stars than Paris, it’s a real assault on the senses.

Shimizu is one of the most spectacular ports in Japan, a sweeping bay in the shadow of the iconic Mount Fuji. You can spend some time admiring the views and wandering through peaceful pine groves, or visit the unique Shimizu Sushi Museum at the S-Pulse Dream Plaza shopping mall.

The friendly southern Japanese city of Kagoshima enjoys a balmy climate, and sits just across the bay from the very active Sakurajima volcano, which erupts so regularly that an ‘ash forecast’ is included in local weather reports.

Ishigaki is the most developed of the Yaeyama islands, an idyllic tropical archipelago located closer to Taiwan than mainland Japan. The offshore coral reefs make this a popular spot for diving and snorkelling, while the jungle interior offers some great hiking opportunities.

Manila is a sprawling, chaotic conglomeration of soaring skyscrapers, faded colonial facades and ramshackle slums, and it’s certainly not everyone’s cup of tea. But if you have the stamina and an inquisitive nature, there is plenty to be enjoyed in the Philippines’ boisterous capital.

The little island of Boracay is home to some of the world’s most beautiful beaches, including the aptly named White Beach. If sunbathing doesn’t appeal then there are plenty of more active pursuits on offer, including diving, kiteboarding and windsurfing, or you can take a trip out on the water on one of the pretty ‘paraw’ boats.

Puerto, as the locals call it, is the capital of Palawan province, founded by the Spanish in 1872. The city is the only major metropolis in this otherwise pristine and sparsely populated region, and the main attraction here is the spectacular Subterranean River National Park just to the north.

Kota Kinabalu is the gateway to the Malaysian state of Sabah and makes for an excellent base, whether you’re planning on scaling the commanding heights of Mount Kinabalu, exploring the islands and turquoise waters of Tunku Abdul Rahman Marine Park, or embarking on a trip into the jungle to encounter Borneo’s fantastic wildlife.

Muara is the main port of Brunei Darussalam, a tiny Islamic sultanate on the northern coast of Borneo. The sultan’s wealth is legendary, as is his sprawling 300-acre palace, although the capital city, Bandar Seri Begawan, is a surprisingly understated and likeable place, with an intriguing mix of Malay, Chinese and indigenous cultures.

The sweltering city of Semarang, on the north coast of Java, is an intriguing mish-mash of Chinese, Islamic and Dutch colonial influences. We recommend escaping the heat with a trip up into the mountains to visit a coffee plantation, or joining an excursion to the extraordinary temple complex at Borobudur.

Surabaya, situated on the northeast coast of Java, is Indonesia’s second largest city and the place where the country’s struggle for independence began. The warren-like Arab Quarter is worth exploring, though many visitors use the city as a base for visiting nearby Mount Bromo.

The beaches, spectacular volcanic scenery and lush green rice terraces lend Bali a natural beauty that seems to dovetail perfectly with the island’s distinct Hindu culture, which adorns the landscape with stunning temples.

Celukan Bawang is the main port in northern Bali, with quite a different feel to the more touristy parts of the island. Here you can see the magnificent Bugis schooners of Sulawesi, and nearby sights include the former Balinese capital of Singaraja, the wildlife sanctuary of West Bali National Park and the black sand Lovina Beach.

Indonesia’s capital is noisy, chaotic and choked with some of the worst traffic in Asia, a sprawling megacity that’s home to over 10 million people. If you can get past all of that then Jakarta has plenty to offer, with the country’s best museums and restaurants, an atmospheric old harbour and a rich mix of cultures from all over the Indonesian archipelago.