Leading away from the "White Gate" of Bad Homburg's castle gardens, Landgrave Frederick V Ludwig and Caroline had the "Tannenwaldallee" laid out in 1770. Together with the "Elisabethenschneise", it forms the backbone along which the individual parks and gardens of the Landgravial Gardenscape are lined up, running in a dead-straight direction for 2.2 kilometres. The Tannenwaldallee was extended under Frederick VI Joseph and Elizabeth in 1821. The similarly straight Elisabethenschneise, on the other hand, runs from the Gothic House some 5.4 kilometres to the "Limes", the former fortified border of the Roman Empire. The individual forest parks of the Great Pine Forest are also situated along this road. Today, some 36 pyramid poplars adorn the avenue, which for many years was entirely treeless, between the Gothic House and the main road that crosses the Tannenwaldallee.
