The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

London's smallest police station is barely the size of a phone booth.

Hear the quietest sound from across the dome.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

The world’s largest LED display, built over an F1 race circuit.

Whitewashed mosque contains the world's largest carpet.

A complex of six forts embedded in the Rajasthan hills.

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.

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

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

The painted and decorated towers of this Hindu shrine were once the tallest structures in one of the oldest cities in India.