Allegheny Portage Railroad National Historic Site is a historic site located in Pennsylvania that showcases the importance of the Allegheny Mountains in early transportation and industrial development in the United States. The site features a restored section of the Allegheny Portage Railroad, which was a critical engineering feat of its time and a crucial link between the Eastern seaboard and the Midwest.

Visitors can explore the park and learn about the history of the railroad through exhibits, ranger-led programs, and tours of the historic structures and grounds. Specific points of interest include the Lemon House, a restored tavern and inn that served travelers along the railroad, and the Engine House exhibit, which houses a replica of a steam engine used on the railroad.

Interesting facts about the area include that the Allegheny Portage Railroad was in operation from 1834 to 1854, and at its peak, it transported over 10,000 tons of goods per month. Additionally, the park is home to a variety of wildlife, including black bears, coyotes, and white-tailed deer.

The best time of year to visit Allegheny Portage Railroad National Historic Site is from May to October when the park is open and weather is favorable. Visitors should also check the park's website for special events, such as guided hikes and living history demonstrations, which are held throughout the year.

Overall, Allegheny Portage Railroad National Historic Site is a must-visit destination for anyone interested in the history of transportation in the United States, as well as those who appreciate natural beauty and outdoor recreation.