A boulevard is a type of broad avenue planted with rows of trees, or in parts of North America, any urban highway or wide road in a commercial district.
Park Avenue in Midtown Manhattan, United States
The Straße des 17. Juni in Berlin, Germany
Mannerheimintie in Helsinki, Finland
An esplanade or promenade is a long, open, level area, usually next to a river or large body of water, where people may walk. The historical definition of esplanade was a large, open, level area outside fortress or city walls to provide clear fields of fire for the fortress's guns. In modern usage, the space allows the area to be paved as a pedestrian walk; esplanades are often on sea fronts and allow walking whatever the state of the tide, without having to walk on the beach.
The Atlantic City, New Jersey boardwalk esplanade, as seen from Caesars Atlantic City, opened in 1870, as the America's first boardwalk. At 5+1⁄2 miles (9 km) long, it is also the world's longest and busiest boardwalk. New Jersey is home to the world's highest concentration of boardwalk esplanades.
Central City Park, Macon, GA; May Day, 1876
Usedom, Western Pomerania, Germany - longest beach promenade in Europe (Ahlbeck here)
Pärnu's beach promenade, Pärnu County, Estonia