Petra, the Nabataean capital carved from rose-red sandstone 240 km south of Amman, has been a UNESCO World Heritage Site since 1985. Its hydraulic engineers supplied a desert city of up to 30,000 people with 40 million litres of water daily — a feat not rediscovered by Western scholars until 1812. Two further UNESCO sites, Wadi Rum and Um er-Rasas, lie within 100 km.

Ancient Merv in the Karakum Desert of Turkmenistan preserves five successive cities built on the same oasis over 4,500 years, from Achaemenid and Parthian settlements to the 12th-century Seljuk capital that was possibly the largest city in the world, with an estimated population of up to one million and 12 public libraries when Paris had none. Mongol forces under Tolui massacred the population in 1221 and destroyed the qanat irrigation system; Merv never recovered its former scale, leaving the Sultan Sanjar Mausoleum standing in isolation across the ruins of a once-colossal city.

Itchan Kala, the walled inner city of Khiva, was the first Soviet Central Asian site inscribed by UNESCO (1990) and remains the most intact medieval Islamic city in Central Asia — its street network and building ensemble survived the Mongol campaigns, Soviet redevelopment, and the collapse of the khanate largely unaltered. The Kalta Minor, an unfinished 1851 minaret stopped at 26 metres when its khan died in battle, and the Juma Mosque, which shelters 212 carved wooden columns some dating to the 10th century, define the architectural character of the Itchan Kala.

Bukhara’s historic centre, a UNESCO World Heritage Site since 1993, contains the oldest surviving Islamic building in Central Asia — the 9th-century Ismail Samani Mausoleum, whose decorative brickwork influenced mausoleum design across the Islamic world — alongside the 1127 Kalon Minaret, which Genghis Khan reportedly spared when his forces burned and massacred the rest of the city in 1220. The bazaar domes, the ruined Ark citadel, and the compact walkable historic centre make Bukhara the most intact Silk Road city in Uzbekistan.

Samarkand has stood in the Zerafshan valley of Uzbekistan for more than 2,750 years, conquered by Alexander the Great in 329 BCE and later transformed into one of the most ornate cities in the Islamic world by Timur and his successors. The Registan square, where three madrasahs of the 15th–17th centuries face each other across a single open plaza, and the Gur-e-Amir mausoleum, where a block of dark-green jade the size of a door marks Tamerlane’s grave, place Samarkand among the most architecturally significant Silk Road cities anywhere.

Hội An is a trading port town in central Vietnam that received merchants from China, Japan, the Netherlands, Portugal, and India during the 16th and 17th centuries; approximately 1,100 historic buildings survive in the old town, including the Japanese Covered Bridge (ca. 1593) and five Chinese assembly halls built by migrant communities organised by province of origin. The town’s historic fabric was preserved by the silting of the Thu Bồn River, which ended large-scale maritime trade and left the town’s buildings intact.

Vat Phou is a Khmer-era temple complex on the slopes of Phu Kao mountain in southern Laos, active from at least the 5th century CE — predating Angkor by 500 years — and oriented along a 1.5 km processional axis from the Mekong River to a sacred spring at the mountain summit. A Shiva temple converted to Theravada Buddhism, it retains Hindu carvings alongside Buddhist images and covers a 390 km² UNESCO cultural landscape inscribed in 2001.

Prambanan is a 9th-century Hindu temple compound 17 km east of Yogyakarta, built around 856 CE with a 47-metre Shiva tower facing a gallery of Ramayana reliefs considered among the finest narrative stone carving in Southeast Asia. It was abandoned in the early 10th century — possibly after a Merapi eruption — fell into ruin over 900 years, and shares a UNESCO inscription with its Buddhist near-neighbour Borobudur, 40 km west.

Bagan’s archaeological zone on the Irrawaddy River contains approximately 3,500 surviving Buddhist monuments from an imperial capital that once held 10,000 religious structures. The site received UNESCO World Heritage status in 2019 after decades of delay over post-earthquake cement restorations — and a 2016 earthquake damaged another 400 pagodas, with restoration still ongoing across the 67 km² plain.

Humayun’s Tomb in Delhi, completed in 1572 by the Persian architect Mirak Mirza Ghiyas under the commission of Haji Begum, introduced the charbagh garden-tomb formula and the double dome to the Indian subcontinent — both adopted directly by the builders of the Taj Mahal. The complex contains over 150 Mughal graves and was the site where the last Mughal emperor, Bahadur Shah Zafar, surrendered to British forces in September 1857. UNESCO inscribed it in 1993.