Only hotel where you can legally launder money.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

A man-made island in scenic San Francisco Bay.

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

Gold Rush-era tombstones line the park's paths.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Thousands of well-dressed mummies below a monastery.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

Historical figures from New York City's Catholic community reside in Midtown.

This collection of 20th-century toys is filled with a lifelong personal toy collection brought from the U.S. to Amsterdam.

A line number in Amsterdam that will likely never be used again due to its tragic history.

A unique work of automotive art calls this shopping center home.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

A public urinal so pretty, it was declared a national monument.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

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

This museum inside Amsterdam's largest cemetery explores how people deal with death.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.