• Open weekends and holidays only, with a cap of 1,000 people inside at a time
• No balls, bikes, scooters or picnics, and dogs are not allowed even on a leash
• Free guided tours of a Civil War bunker 15 m underground run on set dates through the city's Pasea Madrid program

El Capricho is a duchess's 18th-century garden full of follies: a laurel hedge maze, a small brick fort, a boathouse on a winding canal, temples and fountains. Kids hunt for black swans, ducks and red squirrels and try to get lost in the maze. It is a walking garden, so balls, bikes, scooters, picnics and dogs stay outside.