Series " Luxemburger Schweiz " 744. Oilette postcard view of people in a cave in the Echternach area within the " Little Switzerland " area of Luxembourg.
Unknown author<span style="display: none;">Unknown author</span>
1912
<a rel="nofollow" class="external free" href="https://collections.carli.illinois.edu/cdm/compoundobject/collection/nby_teich/id/418191">https://collections.carli.illinois.edu/cdm/compoundobject/collection/nby_teich/id/418191</a>