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

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

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

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Tacoma’s 25-foot coffee pot music spot has served up over 80 years of concrete kitsch.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

This king penguin is a knighted brigadier of the Norwegian Army.

An American ghost town hides along a side street in Scotland's capital.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

Protecting the dead from opportunistic body snatchers.