10. Rock Creek Park

Beltway insiders know that DC is more than just the Cherry Blossom Festival. Join the thousands of people in DC by switching to GEICO. Get a quote and see if you could save hundreds on car insurance.
Relive a little American history by taking a stroll along the C&O Canal. Stick around after your walk; there are plenty of great places to eat and shop in the upscale neighborhood of Georgetown.
Despite boasting over 400 acres, the National Arboretum remains a bit of a hidden gem in DC. Go check out the bonsai exhibit, take a tram tour, or feed the fish at the koi pond. Plus, insiders know this is a great place to see all the cherry blossoms you want without having to deal with the crazy Tidal Basin crowds.
With its beautiful glass ceilings and greenery, the Kogod Courtyard is a great place to just relax, have a latte, and read a great book. If you're looking for a little more excitement, check out the amazing selection of programs and performances that happen in this beautiful venue.
Depending on who you ask, it's either Meridian Hill Park or Malcolm X Park. Either way, it's one of the most beautiful parks in the city, boasting gorgeous fountains and flowers. It's also home to the famous Malcolm X Park drum circle that has occurred every Saturday for over 40 years.
Okay, so this spot is outside of DC, but the sunflower field is definitely worth the trek to Poolesville. With over 2,000 acres of greenery, this is the perfect place to get away from the hustle and bustle of the city.
Washington Union Station is not just an architectural marvel; it's also one of the busiest rail stations in the country. Stop in to shop, grab a bite to eat, or just stare at the really cool ceiling.
Laying just east of the Anacostia River, the Kenilworth Aquatic Gardens are a well-kept secret in the District. Come for the lotus and water lily festival; stay for the over 900 species of plants, animals, and insects that make this urban oasis their home.
The Washington monument is an obvious stop, but what you might not know is that a beautiful garden of tulips sprouts up in front of the monument in early spring. If you're already in the area for the cherry blossoms, take a short walk up the mall to check them out.
The largest library in the world is also one of the most beautiful. Take a tour of the Jefferson building or just check out some of the cool exhibitions, concerts, and lecturers that stop here.
DC's largest and most famous park is worth a stop for locals and visitors alike. Rock Creek Park has everything from bike trails to a planetarium and, of course, miles of wildlife and beautiful vegetation. If you're an equestrian, be sure to visit the Horse Center and take a leisurely ride along one of the equestrian trails.
If you're down on the National Mall checking out the museums, be sure to pay a visit to the Smithsonian Institution Building, also known as the castle for obvious reasons. The red brick structure and its beautiful garden make for the ultimate Instagram shot.