Socotra, a UNESCO Natural World Heritage Site in the Arabian Sea, holds one of the world’s highest concentrations of endemic species — including the dragon blood tree with its distinctive inverted-umbrella canopy — produced by six to seven million years of near-total isolation. On the In Danger list since 2021 due to the Yemen civil war, the archipelago remains one of the most extraordinary natural environments on Earth, with careful planning required for any visit.

Lumbini in Nepal’s Terai lowlands is the site where the Buddha is said to have been born around the 5th century BCE, confirmed by an inscription placed by Emperor Ashoka in 249 BCE — the earliest written evidence linking a physical location to Siddhartha Gautama. UNESCO-inscribed since 1997, the Sacred Garden preserves the Mayadevi Temple, the Ashoka Pillar, and the Nativity Stone, surrounded by a monastic zone where 26 nations have built monasteries.

Pasargadae in Fars Province, Iran — UNESCO World Heritage Site since 2004 — was founded around 546 BCE by Cyrus the Great as the first capital of the Achaemenid Persian Empire, containing the Tomb of Cyrus, the earliest known formal garden (origin of the word “paradise”) and the Tall-e Takht coronation platform, located 90 kilometres north of Persepolis.

Mỹ Sơn Sanctuary in Quảng Nam Province, Vietnam — UNESCO World Heritage Site since 1999 — was the religious capital of the Champa Kingdom from the fourth to the fourteenth century, preserving the longest uninterrupted Hindu brick-tower building tradition in Southeast Asia, despite the destruction of its finest group of towers in a 1969 American air strike.

Tràng An Scenic Landscape Complex in Ninh Binh Province, Vietnam — one of UNESCO’s rare mixed Cultural and Natural World Heritage Sites (2014) — combines a drowned limestone karst landscape, 30,000 years of archaeological evidence and the remains of Vietnam’s first independent medieval capital at Hoa Lu, all explored by flat-bottomed boat through 47 cave passages.

Vat Phou, on the slopes of sacred Phou Kao mountain in southern Laos, is one of the oldest surviving Khmer temple complexes — predating Angkor Wat by several centuries. Its UNESCO-inscribed cultural landscape encompasses a 6-kilometre ceremonial axis from the Mekong to the summit sanctuary, two ancient reservoirs, and the probable ruins of a 5th-century Chenla kingdom capital at the mountain’s base. It remains an active pilgrimage site, drawing thousands to the annual Makha Bucha festival each February.

Cahokia, near Collinsville, Illinois, was the largest city in pre-Columbian North America, built by the Mississippian culture between 900 and 1200 CE with a central earthen mound larger in base area than the Great Pyramid of Giza. A UNESCO World Heritage Site since 1982, it includes Monks Mound, a reconstructed solar calendar (Woodhenge), and evidence of a complex society with long-distance trade, astronomical knowledge and monumental civic architecture — all created without metal tools or written records.

Monte Albán, perched on an artificially leveled mountaintop 400 metres above the Valley of Oaxaca, was the capital of the Zapotec civilisation from 500 BCE to 700 CE and one of the first cities in the Americas. Its Great Plaza, arrow-shaped Observatory, carved Danzante slabs and over 200 tomb chambers document a culture with writing, advanced astronomy and monumental architecture centuries before the better-known Aztec and Maya reached their peak.

The Gyeongju Historic Areas preserve the capital of the Silla Kingdom across five distinct urban districts including royal burial mounds, an intact astronomical observatory from 632 CE and two of Korea’s finest Buddhist monuments at Bulguksa Temple and Seokguram Grotto. Reachable in two hours from Seoul by high-speed train, Gyeongju offers one of the most concentrated and varied UNESCO heritage experiences in East Asia.