A spectacular tribute to statesman and philanthropist Andrew Mellon.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Fortified medieval tower house with lovely roof garden.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

Go inside to really appreciate this 500-year-old technological masterpiece.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

A grotesque Fiji merman dwells within this traditional Dutch-style building.

Home of the only civilian casualty at the Battle of Gettysburg.

The United States Capitol's former columns still stand.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Home to a vast and influential collection of Shakespeareana.

A secret greenspace hides atop a Capitol parking garage.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.