Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Enjoy dishes that founding fathers once ate at this Colonial Williamsburg pub.

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

The hippo that stands on this university campus was once a drunken flea market purchase.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

This seemingly random 30-foot statue of an oryx in Qatar's capital was a mascot for the 2006 Asian Games.

This mix of Islamic art, vintage vehicles, weaponry, architecture, and history is an ode to eclecticism. 

The enormous diamond-shaped building packs a trove of academic and literary treasures into one futuristic space.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

This century-old cinema is complete with musical interludes and boasts a rare projection system.

The absurd creation is a compulsory destination for selfies in Buffalo.

This forgotten boat elevator was an engineering marvel in its heyday.

A 10-foot-tall concrete Alley Oop statue left over from World War II now stands on the side of the road.

An interesting look into 18th-century American history.

This is the oldest Roman-made bridge in the city still existing in its original state.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

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

Along the most northwestern point in Africa is an ancient cave surrounded by legends.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

Mosaics, storks, and brothels—this ancient city has it all.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.