Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

The world’s largest concentrated solar plant generates as many problems as megawatts.

This giant temperature attraction created some giant electric bills.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

A lawn full of retired spacecraft on display at one of NASA's first research labs.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The modern birthplace of Irish freedom.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

One of Ireland's most infamous prisons for rebels including men, women and children.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

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

The beautiful, ornate weather station is the most popular geocache in Salzburg.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

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

At just 51 feet and 10 inches long, it's the shortest street in England.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.