PHOTO: An Amtrak train. (photo via Flickr/Extra Zebra) Tourists looking to explore the East Coast during the summer vacation season will love Amtrak's newest three-day sale.The offers mean travel for as low as $9 on the rail company’s popular Northeast Regional service,Customers will be able to purchase tickets between June 20 and June 22 for travel between July 17 and August 31. The discounted fares are only available on Amtrak’s official website and for one-way coach fares. Prices are subject to availability and other terms and conditions apply.MORE Car Rental & RailBelow are the special prices available, via Amtrak.com:—Washington D.C. to/from Richmond = $19—Philadelphia to/from Baltimore = $25—Washington D.C. to/from Philadelphia = $28—Philadelphia to/from Newport News = $37—Philadelphia to/from Norfolk = $40—Baltimore to/from Newport News = $33—Baltimore to/from Norfolk = $35—Philadelphia to/from Richmond = $35—Richmond to/from Baltimore = $25—Washington D.C. to/from Norfolk = $30—Baltimore to/from Washington D.C. = $9—Washington D.C. to/from Newport News = $27READ MORE: Amtrak Expands Train Status Alert SystemThe cities and destinations along the East Coast are popular tourist destinations for summer travelers, and the Northeast Regional offers a comfortable way to explore throughout the Northeast Corridor and intermediate cities along the route.Amtrak offers customers spacious seating, outlets, complimentary Wi-Fi and extra storage space for baggage.With more than 500 destinations across the national network, Amtrak is an ideal alternative to traveling via vehicle or flying.Follow @Donald_Wood