An Ambalama (Sinhala: අම්බලම) is a place constructed for pilgrims, traders and travelers to rest in Sri Lanka. This is a simple structure designed to provide shelter for the travellers. There were no charges involved in using an Ambalama.
In literature
In Salalihini and Gira sandeshas, there are references to Ambalamas.
References
Ambalama Wikipedia(Text) CC BY-SA