An 18-meter-long sarcophagus of a constantly growing dead prophet.

The ruins of an ancient Zoroastrian Tower of Silence believed to be the earliest example of the traditional funerary practice.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

At 72 feet below sea level, it's the lowest commercial airport in the world.

Iconic pyramid from famed British architect Norman Foster designed to represent all of the world's religious faiths.

A brilliant turquoise lake in the mountains.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

Tens of thousands of tiny birds swarm into one school chimney every fall.

This century-old cinema house has a marquee that has been hand painted by a single man for over 25 years.

This magnificent blue mosque in Afghanistan is surrounded by thousands of white doves.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The oldest farmer's market in America is so ancient it was approved by the King of England.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

The world's oldest continuously operating airport was founded by the Wright Brothers.

The first patented shaved-ice machine heralded a snowy wonderland of iced treats at a favorite New Orleans summer shack.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

The highway's southernmost spot is a beloved local attraction.

Found: Garden of Eden in Miami-Dade County, Florida.

This lush Florida island is home to the ruins of a crooked ship breaker's tiny empire.