Given a 1m20cm x 1m80cm surface, several outdoor shower designs are possible. Here are a few ideas, categorized by style and incorporating the space constraints:

1. Minimalist Modern:

• Design: A simple, sleek enclosure using frameless glass panels (approximately 1m high) on three sides, leaving one side open for easy access. The showerhead would be mounted on a wall-mounted arm, with a simple drain in the floor. A small, integrated shelf could be added for soap and shampoo. The floor could be composed of large, non-slip tiles (e.g., porcelain or natural stone) for easy cleaning and a modern aesthetic. Consider using dark grey or black grout for a contemporary look.

• Materials: Frameless glass, porcelain tiles, stainless steel showerhead and fixtures.

• Considerations: This design maximizes the feeling of spaciousness within the limited area. Ensure proper drainage is installed to prevent water pooling.

2. Rustic Charm:

• Design: Use natural materials like cedar wood for a partially enclosed structure. Three walls of cedar planks, leaving one side open. The showerhead could be mounted on a rustic-style arm. The floor could be composed of river rocks or large, tumbled stones set in a bed of gravel for drainage. A small wooden shelf could be added for toiletries.

• Materials: Cedar wood, river rocks, gravel, galvanized steel showerhead and fixtures.

• Considerations: Cedar wood requires regular treatment to prevent rot and insect damage. Proper drainage is crucial with a gravel base.

3. Tropical Oasis:

• Design: Create a more enclosed space using bamboo or woven panels for three walls, leaving one side open. A thatched roof could be added for shade and a tropical feel. The showerhead could be mounted on a simple arm. The floor could be composed of smooth river stones or large tiles. Include lush tropical plants around the shower for a truly immersive experience.

• Materials: Bamboo, woven panels, thatch, river stones, or tiles, brass or copper showerhead and fixtures.

• Considerations: Bamboo and thatch require regular maintenance and may not be suitable for all climates.

4. Mediterranean Elegance:

• Design: Use white or light-colored stucco or stone for the walls, creating a partially enclosed space with three walls. A simple, elegant showerhead could be mounted on a wall-mounted arm. The floor could be composed of large, light-colored tiles. Consider adding a small mosaic detail to one wall for a touch of elegance.

• Materials: Stucco, stone, light-colored tiles, ceramic or porcelain showerhead and fixtures.

• Considerations: Stucco requires proper preparation and application to prevent cracking.

Regardless of the chosen style:

• Drainage: Proper drainage is essential to prevent water from pooling and causing damage. Consider a sloped floor leading to a drain.
• Privacy: Consider adding some form of privacy screening, such as plants, a fence, or a curtain, depending on your location and preferences.
• Hot Water: If you want hot water, you'll need to run a hot water line to the shower. Consider a tankless water heater for efficiency.
• Safety: Use non-slip materials for the floor to prevent accidents. Ensure adequate lighting.

Remember to check local building codes and regulations before starting construction. These are just starting points; feel free to mix and match elements from different styles to create a unique and personalized outdoor shower that fits your needs and preferences within the given space.