Frankfurt LuminaleFrankfurt steps into the light Sunday and through April 20 during the city’s biannual Luminale. More than a hundred objects, from skyscrapers to churches, will be illuminated in unusual ways. For details, see messefrankfurt.com.

Festive walk in VeniceVenice, Italy’s annual Su e Zo per i Ponti walk on Sunday is organized for charity, but promises a fun day out.

Start from Piazza San Marco at 10 a.m. Folk groups mingling in the plaza throughout the day add to the festive atmosphere. Registration costs 6 euros and is possible on the day of the event, provided tickets are still available. Learn more at www.suezoperiponti.it/en/suezo_en.htm.

Museum deals in HollandIn Amsterdam and throughout Holland, visit numerous museums free of charge or at a reduced cost on Saturday and Sunday. More than 500 museums will participate. See what’s on offer at www.museumweekend.nl.