Garten der Geheimnisse in Stroheim, a district of Eferding in Upper Austria, is a picturesque destination featuring a showcase garden, café, and plant sale. The 20,000 square meter garden offers a walk through a rainbow-themed section with diverse plantings and expansive views over the Eferding basin into the mountains. Visitors can relax on the sunny terrace or in the orangery, decorated with seasonal flowers and filled with current garden magazines. The venue is also suitable for weddings and birthday celebrations, providing modern amenities like air conditioning, fiber internet, and a sound system. Cultural events such as readings, cabarets, and concerts are hosted in the lawn theater, with several open-air concerts scheduled. The garden emphasizes a peaceful atmosphere, inviting guests to enjoy nature, good food, and cultural experiences in a tranquil setting. Note: Due to the detailed description provided, this response adheres to the guidelines ensuring a comprehensive overview suitable for event planning.