Nisarg is a free theme for WordPress created by Falguni Desai.
Nisarg is a new fully responsive and translation ready theme that allows you to create stunning blogs and websites. Theme is well suited for travel, photography, recipe, design, art, personal and any other creative websites and blogs. The theme is developed using Bootstrap 3 that makes it mobile and tablets friendly. It has various options in WordPress Customizer to change look of the theme. Theme customizer can be used to add your own header image of flexible height, background image, to set background color, header text color and accent color.
(Description "Nisarg" Theme from wordpress.org)
You can download Nisarg for free via the provided download link and include it into your themes folder of your WordPress installation. Also you can directly search for it in the WordPress admin interface in the themes section and install and activate it from there.
More information, screenshots and reviews of Nisarg Theme can be found here.