The Lotus Temple, located in New Delhi, India, is a Bahá'í House of Worship.

Notable for its flowerlike shape, it has become a prominent attraction in the city. The Lotus Temple has won numerous architectural awards and has received wide range of attention in professional architectural, fine art, religious, governmental, and other venues.

You can take virtual tour by clicking the link below:
The Bahá'í House of Worship

Wikipedia article quotes,

Inspired by the lotus flower, the design for the House of Worship in New Delhi is composed of 27 free-standing marble clad "petals" arranged in clusters of three to form nine sides. The nine doors of the Lotus Temple open onto a central hall slightly more than 40 meters tall that is capable of holding up to 2,500 people. The surface of the House of Worship is made of white marble from Penteli mountain in Greece, the very same from which many ancient monuments and other Bahá'í Houses of Worship are built. Along with its nine surrounding ponds and the gardens, the Lotus Temple property comprises 26 acres.

Interior view:

Interior view of the symbol of the Greatest Name (Bahá'í belief), set at the top of the temple:

Beautiful sight at night!