A completely new type of literature emerged with the Romantic period in the 19th century. Travellers to distant countries published a travelogue after their return, which was literally devoured by the population. The beginning of this literature was marked by such names as Alexander von Humboldt and Johann Wolfgang von Goethe.
Alexander von Humboldt (1805-34): Die Reise in die Äquinoktial-Gegenden des Neuen Continents 
August Kopisch (1838): Discovery of the Blue Grotto on the island of Capri
K.G. Fiedler (1841): The cave of Kalafidg on Thermia
K.G. Fiedler (1841): The Cave of the Lernaean Serpent
Ferdinand Gregorovius (1857): Wanderjahre in Italien
Ferdinand Gregorovius (1857): Monte Sant Angelo, from Wanderjahre in Italien
George Forrest Browne (1865): Ice-Caves of France and Switzerland
Theodor Fontane (1880): Wanderungen durch die Mark Brandenburg 
John Burroughs (1895): Riverby
Thérèse Yelverton (1901): In the Mammoth Cave
Emil Grimm (1912): A visit to the Bing Cave