Two of my great loves — pre-Modern interiors and flea markets — join forces in one fantastic mashup: The Brooklyn Flea’s temporary digs at One Hanson Place.

View looking over the mezzanine rail.

During the colder months (till March 28), The Brooklyn Flea is movin’ on up, from its standard location in an empty asphalt lot to the palatial lobby, mezzanine, and underground vault of the former Williamsburg Savings Bank.

If you’re into this sort of thing, it is quite a special experience. The mosaics on the walls and ceiling are spectacular. The food court can be found behind a 6′-thick metal door in the old vault. Vendors populate the old teller booths. The light streaming through the Gothic windows makes the wares seem to glow with their nostalgia.

No need to spend a dime, even. The space is enough of a treasure.

Detail of the mosaic on the back wall of the lobby (seen at a distance in the photo at top).

I ’bout fell off my bicycle Saturday afternoon riding across Brooklyn through Crown Heights, when I rounded a boarded up pre-war apartment building and came upon this giant yellow monster.

So this is the Brooklyn Children’s Museum. Why didn’t anyone tell me Brooklyn had one of those? I really should get me a kid, so I can be in the loop on such swell goings-on.

Not only is the museum a gem to behold, it’s super-sustainable. Designed by Rafael Viñoly Architects and opened last September, the building achieved a LEED Silver rating for its use of rapidly renewable and recycled materials in construction. The big yellow building even has geothermal wells for heating and cooling purposes. Wow. I wonder what those look like.

And check out the Museum from above:

Photo: Michael Moran

Lovely. It’s incredible to see such bold design in a public project—plopped in the middle of Crown Heights, no less, rather than in Dumbo, Brooklyn, or some such trendy (read: ridiculous) location. This place for kids could hold its own against any boutique hotel on the Lower East Side.

Score: 1, NYC Department of Design and Construction. And one for Brooklyn.