Each year melting snow turns these Austrian hiking trails into scuba zones.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

This statue of a Hindu cosmic dancer at CERN is a metaphor for modern physics.

Swiss vineyards in a UNESCO heritage site.

At 8,000 feet, the world's highest tea estate draws visitors for both its products and its panoramic views.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

This peaceful Sikh gurudwara serves around 50,000 free meals every day within its gilded walls.

A blooming house of worship for the masses.

This hilltop warren of monastic dwellings is the result of centuries worth of Mongol attacks.

A complex of six forts embedded in the Rajasthan hills.

Rock-cut cave complex filled with ancient Buddhist artwork.

The world's second-largest sundial, made entirely out of stone.

The second-longest continuous wall on the planet protects a hidden secret in the deserts 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.

This fortress played a key role in the battle that would ultimately give rise to the Maratha Empire.

The world's largest secondhand book market is a haven for bibliophiles and bargain hunters.

The potters' quarter is packed with artists sculpting clay gods with mud from the sacred Ganges river.

A single tree's 2,800 aerial roots give the appearance of a complete forest.

Northern Ireland's Brobdingnagian stepping stones.

Started as a kitchen garden, now the second largest botanical garden in the world.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

It's always summer at the beach inside this former airship hangar.

The prototype for all Nazi concentration camps.