What is it?

Mexico City — CDMX to locals — is one of the planet's great urban epics: a city of 22 million built atop the drained lake bed of Tenochtitlán, the Aztec capital the Spanish razed in 1521. Walk the Zócalo, one of the world's largest public squares, and you'll stand between the excavated ruins of the Templo Mayor and a baroque cathedral that's visibly sinking into the soft ground beneath it. The city is a collision of eras and moods: leafy, Parisian-style avenues in Roma and Condesa; the electric neon and lucha libre roar of Arena México; the mariachi bands tuning up in Plaza Garibaldi at midnight. It is also, by many accounts, the best eating city in the Americas — from 5am barbacoa stalls and blue-corn quesadillas at Mercado de San Juan to Michelin-calibre tasting menus reinventing mole and heirloom maize. Add Frida Kahlo's cobalt-blue house, Diego Rivera's thunderous murals, and the trajinera boats poling through the ancient canals of Xochimilco, and you have a city that rewards curiosity endlessly.

Where is it?

Mexico City sits in a high valley in central Mexico, ringed by volcanoes including Popocatépetl, at an altitude of 2,240 metres (7,350 ft). Base yourself in Roma Norte, Condesa, Juárez or Polanco for walkability and safety, with easy access to Centro Histórico, Chapultepec Park and the Museo Nacional de Antropología. The best months are March to May and October to November, when days are mild and dry; June to September brings dramatic afternoon downpours, while late October to early November delivers the unforgettable Día de Muertos celebrations.

What makes it worth it?

Few cities rearrange your expectations as thoroughly as Mexico City. Travellers arrive braced by outdated headlines and leave raving about the warmth of chilangos, the sophistication of the design scene, and streets alive until 2am with music and food. There's a particular kind of vertigo in descending into the Templo Mayor museum and realising you're beneath a city built on a city built on a lake — history here isn't behind glass, it's underfoot. "I came for a long weekend and started looking at apartments" is a sentiment repeated constantly by first-time visitors. Years later, you'll remember specific tastes: the first bite of al pastor shaved from a spinning trompo, a mezcal sipped slowly in a candlelit cantina, marigold petals scattered across a Day of the Dead ofrenda.

How accessible is it?

Mexico City is one of the easiest world capitals to visit — direct flights arrive from across North America, Europe and Latin America, and most nationalities (US, EU, UK, Canada, Australia) need no visa for stays up to 180 days. It's also outstanding value: hostel beds from $15 a night, stylish boutique hotels $80–200, street tacos under $1 each, and museum entry typically $3–6. The Metro costs about 5 pesos (roughly $0.30) a ride, though ride-hailing apps are cheap and recommended at night. The main physical consideration is the altitude — take your first day slowly, hydrate, and go easy on the mezcal until you acclimatise; air quality can also be poor in winter months. Basic Spanish helps enormously outside tourist zones, and while the city is far safer than its reputation suggests, standard big-city precautions apply: stick to well-lit central neighbourhoods and use official taxis or apps.