Adelphi in United States offers a unique experience to travellers. The nearest major city to Adelphi is Washington D. C.. Take a short trip from Adelphi and set some time aside to explore the Washington D. C.. Dotted with places like Washington Monument, United States Capitol, Lincoln Memorial; it will definitely be a good idea. A holiday in Adelphi can generally be of 1-2 days.
Yes,it is that simple really! Enjoy your trip! Keep travelling!