This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

Huge masonic hall in Philadelphia with lavishly themed rooms.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The world’s first penitentiary, meant to be humane, drove men insane.

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

Elvis's own personal tropical hideaway.

Home to drunken tower-climbing goats... seriously.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Just outside the Ohio Supreme Court sits a testament to justice.

An art deco ice cream shop covered in vintage tiles.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

The world's tallest aluminum statue is also the world's tallest image of a winged Virgin Mary.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

Quito's historic, main square dates back to the 16th century.

Home of the "true" equator.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The world's longest known cave system.