Home to the most complete dodo remains known - one head, and one foot.

Used as an example in one of the first dictionary entries for "museum" in 1706.

One of Europe's oldest libraries.

This 11th century tower is said to be the oldest building in Oxford.

The attic of a four-century-old canal house hides a clandestine church.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Christ's blood preserved in a Belgian town.

The fairy tale castle of the "fairy-tale king."

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

The footprint of a frustrated devil in Munich's Cathedral.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A Nesting Doll of Churches.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

One of England's most famous churches hides a pair of little known architectural treasures.

Famously misunderstood wonder of the ancient world

One of the oldest and certainly best preserved Cistercian abbeys still in existence.