A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Hear the quietest sound from across the dome.

The most loyal of little dogs, or a Victorian era publicity stunt?

Strange red rock formations that have been attributed to a higher power for hundreds of years.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

The site of the climactic scene from the classic horror film is now a historic landmark.

At 207 feet, one of the world's longest continuous escalators.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A trio of colossal statues spread across a Dallas neighborhood chart the emergence of a giant robot born of a locomotive and spilled gin.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

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

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

A little sculpture with a large wardrobe.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

The history and future of cannabis.

A Mexican Romeo-and-Juliet-esque legend has given this super-narrow alleyway a reputation for romance.

Mexico's astounding mummy museum with "the world's smallest mummy."

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Visit the monolithic tomb of America's most famous general.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.