Chehel Sotoun is a palace and garden located in Isfahan, Iran. The palace was built by the Safavid dynasty in the 17th century and it is a fine example of Persian architecture, art, and garden design. Chehel Sotoun means "Forty Columns" in Persian, referring to the 20 wooden columns reflected in the palace's long pool, creating a total of 40 pillars.

The palace is renowned for its impressive reception hall which features beautiful murals and frescoes. The palace's terrace offers stunning views of the surrounding park, gardens, and pool. The building's exterior is decorated with intricate designs and tile work, while the interior is adorned with beautiful frescoes, mirrors, and murals.

The palace is surrounded by a large and beautifully landscaped garden, complete with fountains, reflecting pools, and flower beds. The garden's design is based on the traditional Persian concept of chahar bagh, which means "four gardens". The garden is divided into four sections by water channels, with each section representing one of the four elements: water, earth, air, and fire.

Chehel Sotoun is a popular tourist attraction and a UNESCO World Heritage site. It is a must-visit destination for those interested in Persian history, culture, and architecture.