A Roman watchtower on the Limes was, in essence, a lookout with a roof. The stone ones were about five metres square and perhaps ten metres high, with a ground floor for storage, an upper room for a handful of soldiers, and a wooden gallery with a window or a balcony from which a lamp, a horn or a flag could be used to signal. Where the tower stood, a small patch of ground was cleared, with a ditch around it, and the garrison lived in the tower itself or in a nearby hut. Number 4/81 stands in Hesse, in the Wetterau, between Echzell and the village of Hungen, in a landscape of farmland and low volcanic hills.
The Wetterau is a fertile basin with a loess soil that the Romans valued, and their frontier crossed it on a long, almost straight line from the Taunus toward the Main, drawing the border between the empire and the lands of the Chatti. The big forts, such as the one at Echzell, supported the towers with cavalry, and the supply roads connected them, but out here at the tower you were alone with the wind, and the chance of seeing smoke on the next hill. Reconstructed towers at a few places in Hesse show what this looked like, but here you must imagine it.
Riding around Echzell is easy and slightly sleepy. The country roads cross open fields and orchards, with a few climbs towards the Vogelsberg, an extinct volcano, whose slopes offer more engaging curves. Surfaces are good, and the villages are of half-timbered houses with farm yards. A tractor or a combine can be a long way ahead of you, so patience is useful. Summer afternoons can be hot, and thunderstorms roll over the hills in the evening.
Echzell, three kilometres away, has about six thousand people, with a bakery, shops, a few inns and a petrol station, and the town of Nidda is a bit further. Fill your tank in the larger places before heading into the quiet lanes. The Limes line is part of the UNESCO Upper German-Raetian Limes, and an information board or marker may stand beside the footpath. Please do not climb on any remains, and stay on the public ways, since farmland is private.