Jena

Jena is a German city known for the Optical Museum, displaying vintage Zeiss microscopes and a spectacles collection. Planetary projections and musical laser shows take place at the Zeiss Planetarium. Nearby, the Botanical Garden has a tropical greenhouse and medicinal plants. The Karmelitenklosterruine is the remains of a 15th-century monastery. The Saaleradweg cycle path follows the Saale River through the city. ― Google