Built in 1972, but deceptively modern in appearance, the 128m-tall cylindrical JenTower was intended to be a Zeiss research facility, but proved unsuitable. There's a shopping mall at ground level and two open-air observation decks at the top, offering sensational views from 125m above the city.
Lonely Planet may earn a commission from affiliate links on our site. All recommendations and reviews reflect our own independent opinions.







