[ free // augmented reality // public art ]

interactive digital artworks living in the physical world

4th Wall is a free augmented reality app by artist Nancy Baker Cahill. Explore every project — past, present, and upcoming through 2026

Participatory Public Art

Interactive, participatory AR public art shaped by its audience.

Public Art

Site-specific AR artworks placed in public spaces.

Guest AR

Collaborative works by invited guest artists.

Coordinates

Location-anchored projects you unlock by traveling to their exact coordinates.

Featured projects

Participatory Public Art · Gray Area, San Francisco, CA

Participatory Public Art · LACMA / LA Central Library / Long Beach City College

Participatory Public Art · Whitney Museum of American Art, New York

Public Art · Hammer Museum & Bradbury Building, Los Angeles

Participatory Public Art · WeHoArts, West Hollywood, CA

Public Art

Public Art · multiple

Guest AR · Oaxaca City, MX

Get the app

Download 4th Wall and step into augmented reality public art — wherever you are.

Scan to download