Good morning on this radiant Tuesday.

A local gem is drawing national applause.

The Ridgewood Reservoir, which began operations on the Brooklyn-Queens border in 1858, was added this month to the National Register of Historic Places.

“Without this supply of water, Brooklyn would not have been able to grow into the third-largest city in the country in the 1860s and, by the end of the 19th century, an industrial powerhouse,” said Matt Malina, the founder of NYC H2O, a nonprofit that provides educational programs on city water and ecology. “And now it’s a treasure for the community.”

We can attest.

When we visited the reservoir, a 50-acre oasis in Highland Park that was decommissioned by the 1980s, we discovered what looked like a fall scene from the English countryside: a gray-blue pond, flat and still as glass, surrounded by a golden meadow and the remnants of a centuries-old iron gate.