Here are some examples of the various gallery styles available for your website.
The size of the previews and background color can easily be adjusted to your specifications.

Basic Gallery

Image Carousel

Responsive Image Gallery

Justified Gallery

Masonry Image Gallery

Single Thumbnail Gallery

Image Viewer

UR Image Slider

pexels-photo-1580173
pexels.photo-of-canon-camera-on-wooden-log-2534475
truck
old_paper
lion
pexels-photo-2773242
pexels.man-standing-below-a-wooden-structure-2976370
photo-of-multi-coloured-hot-air-balloons-3027216
pexels-photo-1580173 pexels.photo-of-canon-camera-on-wooden-log-2534475 truck old_paper lion pexels-photo-2773242 pexels.man-standing-below-a-wooden-structure-2976370 photo-of-multi-coloured-hot-air-balloons-3027216
]