Art Nouveau painter Alphonse Mucha spent 18 years creating these monumental paintings of Slavic history and mythology.

According to legend, this rock represents a young girl trapped by an evil ocean spirit.

An unassuming music museum recounts the rags to riches story of a dramatic Portuguese genre.

This historic timepiece was a popular meeting place for romantic rendezvous in the 1960s.

This tranquil park with a spiral viewing tower is an off-the-beaten-path area where renowned people have planted a small grove of trees.

A fallen bull's legacy lives on in the rural cattle town that is named after him.

An exhibit of endangered species confiscated from smugglers and passengers.

A colorful sculpture of an Australian symbol patrols an otherwise ordinary traffic island.

This stone amphitheater was once part of Nazi Germany's plan to promote propaganda.

A Wisconsin kitsch palace from the 1930s lives its second life in 21st-century Brooklyn.

The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

The abandoned railway bridge stands hidden in the farmland of rural Cumbria.

A remote lodge nestled among some of the world's best-preserved rainforests.

The secret medieval communication system will whisk your words above the noise of the crowd.

What looks like a normal building is really a hollow facade hiding a subway vent.

Experience what life was like in Ireland during the Viking and medieval ages.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

This mesmerizing, colorful structure looks like a tent made from stained glass.

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

This unique temple complex remains off the typical tourist trail.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

These ancient artifacts are a testament to the enduring significance of the bull in Spanish culture.