Early hand-colored photographic postcard of the ornamental lake and grotto fountain at the Palácio de Cristal gardens in Porto (Oporto), Portugal, published by Edition Photoglob Co., Zürich. A large sculptural grotto rises from the center of a reflective pond, flanked by lush gardens; a lone swan drifts in the foreground, and the distinctive iron-and-glass pavilion of the Crystal Palace is visible through the trees at upper center.

• Caption: Porto — Palacio de Crystal — Lago
• Card no.: 47107
• Publisher: Edition Photoglob Co. Zürich
• Status: Unposted