This is a hot spot for plant enthusiasts. A recurring L.A. pop-up where the employees can tell you as much or as little as you want to know about cacti. Marco can tell you about the trees. Must visit, but only open April/May - September/October.
The Christmas light House in the Bronx is a neighborhood fixture that is hard to miss. It is decorated year round with life size statues and is painted bright pink. Though it draws most of its audience during the holidays it is an anomaly throughout the seasons. Such a bizarre place with such exuberant colors and vibrancy attracts an artists eye and will draw you in.
This simple Manhattan salt house is shaped like a monumental grain of salt. The Shed is an effort by the city to make even their most utilitarian architecture into unique pieces of art.
The Brooklyn Flea is another treasure trove of odd finds, cool artifacts, and handmade goodness. If you're looking for inspiration or just something cool to hang on your wall, you can probably find something here. And if all that treasure hunting leaves you hungry, you are in luck--there's a delicious assortment of local food vendors and artisans there too.