Jonathan in the tower at Charles Bridge. (Photo/Sketch: Rachel)

(Photo/Sketch: Jonathan)

Charles Bridge, late afternoon, from the bridge tower. (Photo/Sketch: Rachel)

Charles Bridge tower roof. (Photo/Sketch: Jonathan)

Rooftops of Prague. (Photo/Sketch: Jonathan)

Late afternoon light in Prague's Stare Mesto (Old Town). (Photo/Sketch: Jonathan)

Looking straight down on the Charles Bridge from atop the tower. (Photo/Sketch: Jonathan)

The Charles Bridge is closed to vehicles, but is swarming with people day and night. (Photo/Sketch: Jonathan)

Restaurant staff take a cigarette break on the banks of the Vlatava River. (Photo/Sketch: Jonathan)

Sepia ink pen sketch of the bank of the Vlatava from the Charles Bridge (left) to Cafe Slavia and the clock tower (right) from the vantage point of an outdoor fish restaurant on the opposite bank. (Photo/Sketch: Jonathan)