The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

Special benches that play Chopin's music are scattered throughout his native city.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

This public artwork, hidden down a cliffside hiking trail, encourages visitors to contemplate the tides.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

A cheeky architectural easter egg.

The world's second-tallest flagpole stands proud despite dropping rank.

This dark, damp, perilous tunnel is the only passage from north to south Tajikistan.

An 18-meter-long sarcophagus of a constantly growing dead prophet.

Controversially restored in the 1970s, this giant 15th-century mosque is shrouded in legend.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Final palace complex of the last of 29 Kokand rulers.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

Witness traditional silk production in the Uzbek city that's been a hub of sericulture for over a thousand years.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

This Soviet statue is based on a piece of propaganda that's been elevated to national myth.

This sprawling market is a one-stop shop for traditional Kazakh foods, from mare’s milk to sheep’s head.

Beatlemania is still going strong... at least in Kazakhstan.

This Soviet-era athletic and recreation facility is the highest ice skating rink in the world.

One of the world's first dedicated bank buildings in the world is now the oldest one.

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

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

A concrete mushroom that divided Stockholm residents for nearly a century.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.