The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

A tower that pays homage to local sailors who perished under the waves.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

A brutalist gem towering over the heart of Milan.

One of the world's heaviest musical instruments towers within a popular urban park.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

This controversial statue once honoured a Russian Field Marshall, before ultimately being dismantled in a push to remove symbols of Russian influence.

This large, circular tomb is the final resting place of the first emperor of Rome.

A large replica of a monumental Roman inscription is located on the side of this museum.

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

This shrine dedicated to the Virgin Mary is also a tribute from a mother to her fallen son.

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

One of the last few period-correct, hand-operated canal locks in the country.

A circle of giant painted vases in the former pottery capital of the United States.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

An office built to look like a giant basket.

A gas station has taken the place of the home of the 19th American President.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

This small plaza encourages people diagnosed with cancer to never give up hope.