Tapkeshwar temple is the most famous holi temple in dehradun which is totally dedicated to lord shiva. The temple is also known as Tapkeshwar Mahadev Temple. This temple is blessed by nature because there is a natural cave situated inside the temple for shivalinga. The interesting fact of this temple is water drops down from the ceiling of the cave in shivalinga continuously. This is the oldest shivling in the cave. Shivratri is a major festival of this temple. The temple also hosts the annual Tapkeshwar Mela. People visit this place for its interesting facts and enjoying nature's beauty.