Inside the Palm House at the Palmengarten, Frankfurt

Frankfurt's Palm House opened in November 1869, before the Palmengarten around it, which opened in March 1871; the 1869 date still sits over its entrance. Inside, tall palms tower over beds of flowering tropical plants under a broad, shallow glass roof. The Palmengarten has grown a whole complex of display houses since, including the 1980s Tropicarium, but the Palm House remains its historic heart and the part that gave the garden its name.