This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Amsterdam's Red Light District leaves little to the imagination.

A floating cat sanctuary on an Amsterdam canal.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

This hulking behemoth is actually five interconnected towers built in the 1960s.

The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

A progressive LGBTQ hub offers dancing, HIV testing, art, and more.

One of the most important yet well-hidden museums dedicated to the history of medicine.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

A fairy tale castle in modern Rome.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

In the 1940s, Italian architect Mario Cavallè built a dozen of these round homes in northern Milan.

A brutalist gem towering over the heart of Milan.

This poignant art installation raises awareness of violence against women.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

This classic restaurant features a gorgeous mirror-clad room.

Residents of Berlin take their coffee and cake in one of the city’s most restful spaces: a cemetery.