1. Phra Sumen Fort is a historic defensive brick and mortar structure that was built towards the end of the 18th century. It is located in the Banglamphu area of Bangkok, Thailand. The fort’s unique pentagonal shape and the two-story observation tower are its most notable features. The fort was originally built to protect the city from invasion and was later used as a prison. The fort has undergone several renovations over the years, and visitors can now enjoy walking on the ramparts and taking in the panoramic views of the Chao Phraya River.

2. Phra Sumen Fort is open to the public every day from 9:00 AM to 5:00 PM. The fort’s phone number is +66 2 281 0470.

3. Admission to Phra Sumen Fort is free. Visitors can reach the fort by taking the Chao Phraya Express Boat to Phra Arthit Pier, then taking a short walk to the fort. Alternatively, visitors can take a taxi or use public transportation. Parking is limited near the fort.