A nearly unconquerable island-fort in the Indian Ocean.

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

Centuries-old bridges grown from tangled roots.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

The world's foremost museum dedicated entirely to the abacus.

What can compare to the comforting sound of 10,000 toilets running?

This massive neon wheel is the only one of its kind to be built over a bridge.

Two ancient Buddhist temples crown this dramatic rocky pinnacle.

The largest statue in the world towers at 420 feet high atop another 66 feet of pedestal.

A harrowing trail up a mile-high mountain.

The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

17th century mosque for Shah Abbas' harem.

Only the foundation remains of the rest stop building that was hit by three large tsunami waves, killing 47 visitors.

An ancient stone fortress considered by many to be the eighth wonder of the world.

The world's largest banyan tree is followed by a community of worshippers.

This 17th-century mausoleum is topped with an acoustic marvel.

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

This magnificent stepwell is designed as an inverted temple and adorned with 1,500 sculptures.