The remains of the Roman watchtower can be visited.
Roman Limes Watchtower (WP 10/22)

The Upper Germanic-Rhaetian Limes, with a length of 550 km from Eining near Regensburg to Rheinbrohl on the Rhine, is the largest archaeological monument in Germany and has been recognized by UNESCO as a World Heritage Site. Limes (Latin: border path/wall) refers to the border fortifications of the Roman Empire, which were erected towards the end of the 1st century AD.
This border was monitored by more than 900 towers, which were built in timber construction during the initial phase from around 80 AD. Stone towers followed, which were plastered from 150 AD. Excavations have shown that the white plaster often had cracked joints, which were painted in terracotta. This created the impression of beautiful ashlar masonry.
Roman Limes Watchtower (WP 10/22)
Tower site of a wooden tower not yet investigated and a stone tower that had already been excavated in Knapp's time. This is the stone tower whose rising masonry was completely removed and, along with the building inscription, moved to Eulbacher Park, where it was mistakenly declared a tombstone. The building inscription reads:
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Von Haselburg-müller - Eigenes Werk, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=10978112
This description is a machine translation of an excerpt from the linked Wikipedia article. The source text was written by its authors, the translation is by Mobile History; like the original it is licensed under CC BY-SA 4.0.
Location: 49.6653, 9.0759