Scores of vintage street lamps shine along L.A.’s Miracle Mile.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

The world's largest fire hydrant is supposedly tornado-proof.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

A rare wayfinding portmanteau of “Street” and “Avenue.”

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

Look closely and you’ll notice that the color changes a third of the way up the tower.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

"Holy Wisdom" overlooks the city that became its namesake.

Sofia's legislative center is continuously reinventing itself.

The venerated body of a 12th century saint is celebrated each year with the 'Race of the Candles.'

Protecting the dead from opportunistic body snatchers.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

A 200-year-old collection of oddities and medical paraphernalia.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

Architectural monsters are devouring this palace's every door and window.

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

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

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