Mysterious rocks that ring musically when struck.

Where America's first doomsday cult awaited the end of the world.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

A forsaken wonder in the middle of the East Side neighborhood.

Ride the subways of yesteryear.

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

This eatery is emblematic of the connection between Jamaica and Nubia.

This North African stone complex is considered to be the oldest astronomical observatory on Earth.

The city-sized home palace of one of ancient Egypt's most powerful rulers gives us a rare look into the lives of the epoch's rulers.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

Part shoe store, part sociopolitical art gallery, part zoo.

A network of ancient Egyptian tombs built into the cliff face along the Nile.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

In Egypt's expanding metro area, many of the neighbors are dead.

The largest known Ancient Egyptian obelisk.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

An endless sea of white conical domes.

Ozymandias’ time-keeping temple.

Abandoned bull fighting ring, slowly falling apart in Uruguay.

Constructed on the ruins of a convent, this tower saved countless lives.