An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Europe's first floating restaurant is home to a hilarious legend.

A floating cat sanctuary on an Amsterdam canal.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

Amsterdam's former hotspot for public executions and dissections.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

The attic of a four-century-old canal house hides a clandestine church.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

The former headquarters of history's oldest megacorporation.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

The last location where Buddy Holly, Ritchie Valens, and J. P. "The Big Bopper" Richardson played before their tragic deaths.

Dedicated to the humanitarian efforts of the state's former governor.

The headquarters of the prestigious World Food Prize celebrates the heroes in the fight against hunger, has no cafeteria.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

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

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

Two Ming Dynasty lion statues guard the entrance to the journalism school.

The iconic remains of the original Academic Hall that burned down in 1892.

The magazine keeps a perfectly groomed display garden for its photo shoots.

The notorious couple camped at this site after a bloody shootout with police.