This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

A beautiful geyser under environmental threat.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

See massive fossils that are over 200 million years old in northeastern Arizona.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

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

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

This replica of the Greek structure is in the heart of Nashville.

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

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

The celebrated eyesore created by starry-eyed sweethearts.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Look closely and you’ll notice that the color changes a third of the way up the tower.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Eighty million natural history specimens call this gargantuan museum home.

Macabre astrological automaton clock dating to the late 1400s.

The vast, legendary catacombs hold secrets much stranger than stacked bones.