Jerash ruins, also known as Gerasa, is an archaeological site located in the modern city of Jerash in the Hashemite Kingdom of Jordan. The site is a well-preserved example of a Roman provincial city, and it is considered one of the largest and most well-preserved Roman ruins in the Middle East.

The city of Jerash was established by Alexander the Great in the 4th century BC and was later conquered by the Romans in 63 BC. The city was an important trading and economic center, and it was known for its large public buildings, temples, theaters, and marketplaces. During its heyday, the city was home to a vibrant population of tens of thousands of people.

Today, the Jerash ruins are one of Jordan's most popular tourist attractions, and they have been designated a UNESCO World Heritage Site. Visitors to the site can explore the well-preserved Roman streets, theaters, temples, and public buildings, as well as the Hippodrome, the North and South Gates, and the Hadrian's Arch.

One of the highlights of the Jerash ruins is the impressive Oval Plaza, which was once the city's central marketplace. The plaza is surrounded by towering columns and is considered one of the best examples of a Roman colonnaded street in the world. Another popular attraction is the Temple of Artemis, which was one of the largest temples in the city and was dedicated to the Greek goddess of the hunt.