33. Crystal Palace Subway, Dulwich, London
Hidden under a four-lane road in south London, this subway station was originally built to connect the Crystal Palace High Level Station with the famous Crystal Palace, which was built for the World Fair in Hyde Park in 1851. The Palace was sadly destroyed by a fire in 1936, rendering the subway station completely useless—but not destroyed. The station’s gorgeous red-and-cream tiled roof and octagonal pillars have remained standing, resembling architecture you might find in a Byzantine church. The Friends of Crystal Palace Subway organization arranged tours of the station just a few times a year—other than that, this remains one of London’s most beautiful hidden gems.
34. Al Madam, United Arab Emirates
Closely resembling Namibia’s Kolmanskop, Al Madam is yet another sand-buried village, this one located in a desert about 40 miles southeast of Dubai. The village—which was most likely built in the 1970s and abandoned shortly after—is made up of two rows of houses and a mosque, all at least partially covered by the encroaching dunes. As with all ghost towns, Al Madam has a sort of haunted quality to it, made even spookier by the surrounding, seemingly endless sea of ochre sand.