Half-size replica of the Taj Mahal.

An ancient iron pillar in Delhi that seems to be rustproof.

A startling, centuries-old subterranean marvel hides in plain sight.

A blooming house of worship for the masses.

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

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

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

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.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

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

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

One of the most controversial statues in Romania is an emperor with no clothes.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

This Transylvanian church has changed its denomination four times.

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

Climbing to the top of the cathedral's bell tower offers sweeping views of these medieval ruins.

The growing stones of Romania.

Romania's triumphal arch looks out over Bucharest.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.