This monument gives insight into how lost children were found in Edo-period Tokyo.

In a largely deserted ghost town, a little brick building recalls its history as a gold rush hub and haven for outlaws.

This collection of vintage signs reflects the long and colorful history of this Arizona town.

The natural hot spring that was integral to the creation of Canada's first national park.

A hidden three-foot-wide house separates these two regal churches.

The tomb of history's greatest potato promoter is surrounded by tubers.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A surprising collection of bronze faces beneath a bridge in Loveland.

An acoustic anomaly with a mysterious cause.

It's believed Matilda Fitzwalter's life was the basis for the famed literary figure.

These small house replicas have stood proudly since the 1950s, even as the property has changed hands.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

Led Zeppelin wrote some of their most iconic songs at this little 18th-century Welsh cottage.

This lookout tower built in the 1930s is now an in-demand cabin with what might be the best view of the Seneca State Forest.

The forgotten remnants of a land-to-sea cable car that was once unique in the world.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

This elaborate High Victorian Gothic structure is one of the world's few 16-sided buildings.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

Perhaps the most spectacular grotto along the Algarve coastline.

Many generations of travelers have passed through the steep, smooth walls of this canyon.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

This stone was once used by druids to determine a person's innocence or guilt.

A museum designed by and dedicated to P.T. Barnum in the town where he is buried.

This isolated island is often capped by its own fluffy cloud.