This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

A tribute to a 13-year-old boy who was kidnapped in 1793 and escaped over two years later.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

One of the indelible moments of the American Revolution took place at this location.

Ice cream stand, snack bar, and time capsule of milk conveyance.

The painting on an aptly named street honors the 1980s slasher movie.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

One of the richest places in the United States has a cursed street.

The humble fort that saved Washington.

A decommissioned military complex that's now a modern industrial park.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

This stately bank building hides a spectacular star-studded ceiling.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

38-story baroque tower reflecting Detroit's rise, fall, and possible rise again.

World's largest collection of serial killer artwork and other macabre exhibits.

This singular Mexican structure is considered a masterpiece of the Tapatía architectural school.

Cryptic messages embedded in the New York City sidewalk.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.