Typically, such groves are associated with the concept of a "presiding deity". While most of these sacred deities are associated with local Hindu gods, sacred groves of Islamic and Buddhist origins, and some based on smaller local religions and folk religions (like the folk deities ayyanar and amman ) are also known of. There are over 1000 deities associated with sacred groves in the states of Kerala and Karnataka alone. In Kodagu district in Karnataka from time immemorial the martial community of Kodavas had maintained over a 1000 Deva kadus dedicated to Aiyappa the forest god.
The Hindu tradition considers forests (Van/ Ban) to be of three types - Tapovan, Mahavan and Sreevan. Tapovan are forests associated with penance (Tapas), and are inhabited by saints and rishis. Mahavan refers to the grand natural forests. Tapovan and Mahavan are considered to be a Raksha ("sanctuary") for flora and fauna as ordinary human beings are not allowed to enter these forests. Sreevan, which means, "forests of prosperity", consists of dense forests and groves. From the former, people would collect dry wood, leaves, forest produce and a limited amount of timber, though natural ecosystem would not be unnecessarily disturbed. Groves were considered as spaces of forests from where harvesting could be done. Sometimes, specific trees like mango trees could be planted and nurtured here. Groves were associated with religious rites, festivals and recreation. Typical recreational activities associated with these groves included jhoola/ jhoolan.[3] In the villages, Panchavati, or a cluster of five trees that represented the forests, were maintained.
How much have hindus preserved what is basically the same as european religious thinking but in an asian cultural veil?
Can hindus fill the theological gaps your faith seems to suffer from?