This massive underground salt mine now holds a sci-fi theme park in its depths.

Gigantic Romanian salt mines used to heal respiratory conditions.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

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

Romania's triumphal arch looks out over Bucharest.

Featured in one of the most iconic scenes in cinema history.

340-foot statue built to honour the Heroes of the Soviet Union.

The deepest metro station in the world.

An Art Nouveau building covered in animal gargoyles and grotesques.

Deep in the Thar desert, a temple crawling with thousands of holy rats.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

Legend has it a commoner volunteered to be buried alive in the foundation so that the great fortress could be built.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

Fifteen Jodhpur queens left their handprints before going to their fiery death.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

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

Tucked in Mumbai’s wealthiest neighborhood is one of the city’s oldest and most sacred sites: a temple complex believed to house the waters of the Ganges.

World's most expensive home.

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

A mere stone's throw from Islamabad exists a spectacular display of three millennia of humanity's progress.

Space-age minarets towering over Islamabad.

An otherwise ordinary park with a dark past.