For about three weeks from mid-November, Buenos Aires turns violet as its 18,922 jacarandas flower on bare branches. For the southern half of the world it is just spring on time; for a northern traveler it is a warm season to borrow while home heads into winter.

Why it works, and how to catch it:

  • Go mid-to-late November; by the second week of December the branches are green and ordinary again.
  • It is spring here, highs near 25 Celsius (77 Fahrenheit), the summer humidity still weeks off.
  • Walk the dense corridors, Cabildo, del Libertador, Cordoba, Corrientes, San Juan, through Belgrano, Recoleta, and Palermo.
  • Do not hunt one famous tree. The jacaranda is a street tree, best by the block.

Only the fourth most common tree in the city, and still the one that stops you.