The main gateway is Adolfo Suárez Madrid–Barajas Airport. The Metro Line 8 (pink) connects all four terminals to the city centre; the journey to Nuevos Ministerios takes around 13 minutes and from there you can transfer across the entire network. A supplement applies for airport Metro journeys on top of the standard fare — confirm the current amount at the ticket machines or the official EMT/Metro Madrid website before you travel. Avoid unmarked taxis at arrivals; use the official taxi rank (white cars with a red diagonal stripe) or a pre-booked ride.
Madrid runs on its own clock. Lunch is the main meal, typically served 14:00–16:00, and dinner rarely starts before 21:00 — restaurants that open at 19:00 are largely catering to tourists. Showing up for dinner at 19:30 and finding a half-empty room is normal. Adjust your rhythm by day two and you'll eat far better for far less. Tipping is appreciated but not mandatory; rounding up or leaving 5–10% at sit-down restaurants is standard practice.
The Metro network has 13 lines and covers every major neighbourhood and attraction. A 10-trip Metrobús card (valid on both Metro and city buses) is significantly cheaper per journey than single tickets and can be shared between travellers. The Retiro park, the Prado, the Reina Sofía, and the Thyssen-Bornemisza museum are all reachable by Metro with no more than one transfer from the centre. Many major museums offer free public entry during set hours — check each museum's official site, as these windows shift seasonally.
Two common first-timer mistakes: over-scheduling and underestimating walking distances on the map. Madrid's city centre looks compact but its boulevards are wide and its hills real — the walk from Sol to the Royal Palace is longer than Google Maps suggests. Build in at least one unplanned afternoon to sit in a terrace bar, order a caña (a small draught beer) or a vermú, and watch the city. That, more than any single attraction, is how Madrid actually feels.