The illuminating collection of L.A. street lights is run by the city and only opens one day per month.

The inventor of the Coney Island hot dog rests in a grand mausoleum in Brooklyn.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

Inside the cloister of the Temple of San Juan Bautista is a ceiling decorated with gold Baroque illustrations.

These unusual paintings give thanks to the saints and deities who granted people favors and miracles.

Just outside of Nairobi lies a large estate surrounded by endangered Rothschild giraffes, who have been fed from the window by Mick Jagger and Walter Cronkite.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

Thousands of years ago, Indigenous people painted images onto these canyon walls that are still on display today, provocative, mysterious, and enduring reminders of the people who lived here long ago.

The fifth-longest natural arch in the world, and the longest outside China.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

A replica of the first seismoscope ever invented.

Byzantine emperors ruled, lived, and died in this 13th-century palace-turned-museum.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

Large miniature theme park with 100-plus models.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

The ornate miniature mansions were built for Istanbul's feathered residents.

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.