This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

A Soviet era flat that refused to conform to the dull gray standards.

The world's longest nonstop reversible cable car soars through spectacular scenery to the medieval Tatev Monastery.

A scenic canyon with thick forests and historic ruins.

Azerbaijani ghost town, decaying after a war left it an armed forces buffer zone.

Magnificent Roman ruins lie vulnerable to destruction on the edge of the Mediterranean.

70 years of foreign military influence on the shores of Tripoli, Libya.

This triumphal arch is the only fully standing structure that remains from Roman-era Oea.

A fortress-like granary that has been continually in use for more than nine centuries.

A beautiful oasis town dating back to the Roman period still serves as reprieve from the brutal summer sun in Libya.

A surprising number of shipwrecks visible just off the Somaliland coast.

This cave located in the badlands of Somaliland contains some of the oldest cave art in Africa.

A MiG-17 fighter jet sits atop this memorial to the indiscriminate bombardment of Hargeisa.

The world's largest ship graveyard is the product of decades of corruption.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

An architectural relic that survived the hands of time.

This remarkably well-preserved mosque stands amid an 11th-century caravansary.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's narrowest alley is barely over two feet wide.

Unfortunately, you can no longer spend a night in this single-person treetop hotel.

This chimerical bridge/tunnel appears to dead end right into the sea.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

Swedish skyscraper with a 90° twist.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.