At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

The celebrated eyesore created by starry-eyed sweethearts.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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

This bridge was constructed from the rubble of the infamous Bastille.

In Paris, Texas they have their own Eiffel Tower, it just has a cowboy hat on it.

A rare and unique example of an 18th-century door latch calls this restaurant home.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

A quartet of brightly colored mythical beasts stand sentry at this gateway.

This monument is dedicated to a young boy who survived a disaster that forced Edinburgh to reevaluate its building codes.

This 16th-century close preserves an unusual piece of Edinburgh's transportation history.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Brass bricks outline the locations of Edinburgh's lost, lively market stalls.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.