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

One of the largest squares in Europe contains an entire artificial island.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

The tomb of the mythological founder of Padua is not hidden in some obscure crypt, but stands right in the middle of the city square.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

This former coal gasification plant found a curious second life as a popular public park.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A giant Troll lurks under one of Seattle's oldest bridges.

The only arched bridge made of stone on the entire Mississippi River.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

One of two giant blue cockerel statues erected with an intentional double meaning.

Direct, creative challenge to Mother Nature's winter wrath.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

The 606 is a decade in the making.

All of Chicago's wood-paved streets are long gone but two alleys remain.

G.V. Black, the Father of Modern Dentistry, keeps an eternal eye on Chicagoan’s teeth from his perch in Lincoln Park.

No one knows how many bodies are in this vault in a Chicago public park.

Home to three historic ships from the age of Vikings.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

The ruins of a medieval monastery named after a type of tree.