These slanted cubic abodes are a creative if odd solution to a zoning pickle.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Claude Monet was baptized in this lavishly ornate Paris church.

This demon atop the Notre-Dame de Paris looks utterly bored.

Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.

An icy lake tucked among jaw-dropping alpine panoramas.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A delightful but little-known public observatory and planetarium in Munich.

Fantastic views and thousands of love locks.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

This once architecturally advanced housing complex is now a haven for squatters that still bears the scars of war.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

The Greek island's old British cemetery feels like a forgotten garden.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

The abandoned summer estate of the former Greek Royal Family.

One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

Where commuters walk through remnants of an ancient Greek necropolis.

Local lore says two enemy dragons live within these breathtaking mountain lakes.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.