The mayor made the declaration in 2004.

This 3,800-year-old site contains markers used to study the movement of the sun and moon and create a lunar calendar.

Stone pillars and a petrified wedding party in the hills of North Macedonia.

Space-age monument to an early 20th-century uprising.

An abandoned bus station transformed into a museum dedicated to the history of Greyhound Lines, in the place where it all began.

Minnesota's oldest and deepest mine is now an underground physics laboratory.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

The remnants of an early American attempt at missile defense.

This sky-high radio mast is formerly the tallest man-made structure in the world.

The U.S.' first commercial park dedicated entirely to flying drones.

A blooming house of worship for the masses.

This massive glowering Lenin head gazes out over eastern Siberia.

The mummified remains of Dashi-Dorzho Itigilov, Russia's most important Buddhist.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

A monument to the defenders of the Arctic in Murmansk, Russia.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

This one-time health resort was used by aristocrats around the world.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

A safe place for the wild donkeys of a hot vacation destination.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.