Ottenhöfen im Schwarzwald is a town in the district of Ortenau in Baden-Württemberg in Germany.

This is possibly the town referred to in Twain's journal:
Pretty girl here. An infernal cuckoo clock in hotel where we took dinner Offenbosen 1 1/2 hour before Allerheiligen.

Twain did not like the way of expressing distances by the time taken to get there:
This cursed way of stating all distances by minutes & hours -- it means nothing. You don't know whether it is 15 M by telegraph, or lounging, or with a sheriff after you.

Ebersteinburg is an Ortsteil of Baden-Baden. At 426m in elevation it lies between the valleys of the Murg and Oos rivers. The village has a population of 1,200 and since 1972 has been part of the city of Baden-Baden.

By 1100CE the Counts of Eberstein had taken up residence and constructed Alt Eberstein on top of the hill. Today only the bergfried and shield wall remain intact.

The village itself lies south of the ruins of Alt Eberstein. When the castle fell into decline, the stones were used in the district.

Gernsbach is a town in the district of Rastatt, in Baden-Württemberg, Germany. It is located on the river Murg, 7 km (4.35 mi) east of Baden-Baden in the Black Forest. Twin towns are Baccarat in France and Pergola, Marche in Italy. The town is the historic centre of the lower Murg Valley and forms a central place of mid-size with Gaggenau. It is located in the Region Mittlerer Oberrhein, one of the twelve spatial planning regions of Baden-Württemberg. Gernsbach is an officially recognised climatic spa with a historic centre.

The castle hotel in Heidelberg was from 1873 to 1964 intermittently a hotel . In a location-dominant location above the Hortus Palatinus of the Heidelberg Castle , it was once one of the best houses on the square, which accommodated numerous prominent guests. Even Empress Sissi , Richard Wagner and Mark Twain were guests here. After the end of the hotel business, the building served until 2000 as an international study center of the University of Heidelberg . Since 2009, a residential complex of apartment complexes has been built on the site of the building.

But Hirschhorn is best seen from a distance, down the river. Then the clustered brown towers perched on the green hilltop, and the old battlemented stone wall, stretching up and over the grassy ridge and disappearing in the leafy sea beyond, make a picture whose grace and beauty entirely satisfy the eye.

Hirschhorn (Neckar) is a small town in the Bergstraße district of Hesse, Germany, and is known as "The Pearl of the Neckar valley”. Hirschhorn is a climatic health resort situated in the Geo-Naturpark Bergstraße-Odenwald.

The Harz is a Mittelgebirge that has the highest elevations in Northern Germany and its rugged terrain extends across parts of Lower Saxony, Saxony-Anhalt, and Thuringia. The name Harz derives from the Middle High German word Hardt or Hart (hill forest), Latinized as Hercynia. The Brocken is the highest summit in the Harz with an elevation of 1,141.1 metres (3,744 ft) above sea level. The Wurmberg (971 metres (3,186 ft)) is the highest peak located entirely within the state of Lower Saxony. https://en.wikipedia.org/wiki/Harz

The Black Forest (German: Schwarzwald, pronounced [ˈʃvaʁt͡svalt]) is a large forested mountain range in the state of Baden-Württemberg in southwest Germany. It is bounded by the Rhine valley to the west and south. Its highest peak is the Feldberg with an elevation of 1,493 metres (4,898 ft). The region is roughly oblong in shape with a length of 160 km (99 mi) and breadth of up to 50 km (31 mi). (reference unknown)

Sam and companions traveled by donkey from Cairo to visit the Sphinx and the Pyramids of Giza on October 5, 1867.
Mark Twain Project: Quaker City Itinerary

Giza (/ˈɡiːzə/; sometimes spelled Gizah or Jizah; Coptic: ⲅⲓⲍⲁ Giza; Egyptian Arabic: الجيزة‎‎ el-Gīza), is the third-largest city in Egypt. It is located on the west bank of the Nile, 5 km (3 mi) southwest of central Cairo. Along with Cairo Governorate, Shubra El-Kheima, Helwan, 6th October City and Obour, the five form Greater Cairo metropolis.

Sam and companions traveled by donkey from Cairo to the Sphinx October 5, 1867.
Mark Twain Project: Quaker City Itinerary