A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The ritual has been performed uninterrupted for nearly 700 years.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

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

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

The most confusing clock in New York.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A bit of retro transportation flair preserved in the world's largest department store.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Eight feet in diameter and more than 24 feet around.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

These azure waters were thought to lead to the Mayan Underworld.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

This erect, phallic geological spire wasn't always named so domestically.

An experimental, automotive replica of Stonehenge.

A bizarre house filled with an astounding array of collections.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.