Longwood is a historic house museum in Natchez, Mississippi, United States. It was built in the mid-19th century as the largest octagonal house in the United States but was left unfinished due to the outbreak of the Civil War. Today, the house is an architectural oddity and an important historical landmark.

As for visiting hours and fees, Longwood is open for tours every day of the week except for major holidays. The terms are offered every hour, on the hour, from 9:00 AM to 4:00 PM. The last tour of the day begins at 4:00 PM.

The admission fee for adults is $20, while children under 12 are free. There are also discounts for seniors, military personnel, and groups of 20 or more. Reservations are recommended, especially during peak tourist season.

It's important to note that Longwood is a historic house museum, and as such, visitors are not allowed to touch or handle any of the artefacts or furnishings. Photography is allowed, but the use of flash and tripods is not permitted.