One-room museum dedicated to India's most enigmatic mathematician.

Scholar, adventurer, saint, and instigator of the Goa Inquisition.

An extraordinary "City of Caves" carved from solid stone.

The remains of what was, not so long ago, the world's largest city.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

Half-size replica of the Taj Mahal.

Rock-cut cave complex filled with ancient Buddhist artwork.

The other side is actually green.

Crumbling necropolis set high above Fez.

A five-square-mile slice of Spain on the Mediterranean coast of North Africa.

Founded as a refugee camp, now a popular tourist spot.

The legacy of a Moroccan Jewish community is remembered at this little mouldering cemetery.

Single runway interrupted by a busy road that cuts across its middle.

Spain's stunning solar energy plant.

The final resting place of the great navigator, or maybe his brother.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

The world's most elegant power lines.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.