Former headquarters of the KGB.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

An exceptional assortment of fossils recovered from private collections.

A huge communist-era propaganda monument and mural that offers stunning views of the Mongolian capital.

Enormous statue of the Emperor of the Mongols.

At 16,627 feet above sea level, this unstaffed station is the highest in the world.

A 17th-century mosque that was used for war more than worship.

A place as enchanting as the journey to reach it is harrowing.

Many Hindus make the long pilgrimage to this holy city to have their remains burned on the banks of the Ganges River.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

Known as the leaning temple, the sacred structure has somehow developed a severe nine-degree slant.

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

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

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.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

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.

The oldest Hindu temple complex in Nepal serves as the seat of Nepal’s national deity, Lord Pashupatinath.

Towering at a height of over 30 meters, this turn-of-the-18th-century landmark is the tallest temple in Nepal.

The former stronghold of the Malla Dynasty has remained virtually unchanged since the 17th century.

This historic square in Nepal is home to temples dating back to the third century.