Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

Ancient serpentine sacrifice holder that has stood the test of time.

A fountain standing as a testament to a doomed alliance.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A marvel of Byzantine engineering under the streets of Istanbul.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Colorful Native American paintings are hidden within this small cavern.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

A vast city of the dead, where the deceased outnumber the living by more than a million.

The most beautiful Taco Bell in the world even has surfboard parking.

One of the deepest blue holes in the world.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

A massive underwater sinkhole made famous by Jacques Cousteau.

A huge, bustling local market in Panama City.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.