This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Italy's "New Mountain" rose from the ground in a volcanic eruption in 1538.

The only museum with its curator—and her pets—buried inside.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

Overlooked amid the tourist bustle of Florence, this museum is dedicated to the craft of stone inlay.

A modern sliver of architecture in Roma.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

The Emperor Tiberius' palace of debauchery.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The Pope’s secret escape route.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

One of seven Jewish catacombs in Rome and one of only two open to the public.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.