The only Bahá'í house of worship in North America and one of only a handful worldwide.

Friction between grains of sand cause a curious "singing" sound.

The heads of two giant mythological water horses honor Scotland's horselord past.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

In paradise, feral pigs have claimed an island all to themselves.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

This elegant arc of a waterfall marks a religious turning point.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

A lush green oasis in the middle of Chicago.

A Bibliophile's Dream.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Two thousand artifacts from around the world collected by one woman who loved to travel.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

Northern Ireland's Brobdingnagian stepping stones.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The atmospheric road was never meant to be so creepy.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.