When travelling South America some decades ago my budget allowed me to stay only in cheap hotels.
Once I made a visit to Cajamarca in the Andes in northern Peru. Arrived late at night.
As usual I checked in at one of the less luxurious places and fell asleep almost immediately.
Next morning the andean light fell in trough that window, and I saw the graffiti !!
Este hotel tiene pulgas: This hotel has got fleas…