A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

A giant can of fruit cocktail is all that remains of what was once the world's largest cannery.

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.

The Internet Age began with a transmission from this biker bar.

This odd California folly seems like it was almost designed to accumulate urban legends.

The world's most famous donkey lives in this pen.

The first high-tech company in the valley that actually worked with silicon devices.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

These Honduran caves earned their magical nickname thanks to reflective bone deposits.

Hidden in the highlands of Guatemala, a small shrine venerates a forbidden folk saint.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

Mesoamerican monoliths and zoomorphic stones covered in royal visages, ancient mythology, and grand celestial events.

A full-size replica of this well-preserved temple lets you take a walk through the Mayan age.

This staircase full of Mayan hieroglyphics is perhaps the largest single text in the world.

This neoclassic cathedral also houses what is believed to be the oldest clock in the Americas.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

The highest point in Washington state is a volcano covered in glaciers.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.