From mid-March to mid-April, thousands of crab apple and Yoshino cherry trees explode into bloom, surrounding this 2.1-mile path with tunnels of white petals. But that’s just one reason to walk (or run!) the paved trail encircling the Tidal Basin reservoir: The string of monuments you'll pass along the way of Martin Luther King, Jr., Franklin Delano Roosevelt, and Thomas Jefferson aren't bad, either. Want to extend your blossom tour? Walk west from the Tidal Basin to Ohio Drive, where the sidewalk sandwiched between Ohio Drive and the Potomac River meanders beneath the branches of Usuzumi, Fugenzo, and Akebono cherry trees.