In the middle of the Alaskan wilderness, lies a train trestle to nowhere.

A colony of Mexican free-tailed bats live under the bridge and take flight at sundown all summer long.

The longest floating boardwalk in the United States.

A mysterious concrete hand reaches out from between the stones of Uniwersytecki bridge.

A natural sandstone bridge nestled within a mature forest in southern Illinois.

A bridge to rival those in nearby Venice but without the crowds.

Lines on the pillar of Heidelberg's Karl-Theodor Bridge record the dramatic heights of past floods.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

After retiring, Gary Pendergrass turned his yard into a wonderland of outsider art.

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.

This centuries-old mansion was the home of the noted 19th-century diarist Anne Lister (aka “Gentleman Jack”).

The future civil rights leader grew up in this Alabama farmhouse.

One of Hollywood's most iconic actresses was born in an upscale Brussels neighborhood in 1929.

This stunningly massive housing complex is a go-to filming location for dystopian sci-fi cinema.

Historic home of a Black veteran of the American Revolution and one of the earliest civil rights activists in the United States.

Once the site of seances, this restaurant is said to be haunted by several ghosts.

Does this church in Naples hold the true tomb of Vlad the Impaler, the notoriously cruel figure who inspired Bram Stoker's Dracula?

This church conducts its services entirely in Norwegian sign language.

The ruins of a fifth-century church dedicated to Our Lady of the Harbor.

This dazzling wooden church was constructed as part of an elaborate peace project after the Thirty Years' War.

On the clock tower at St. Anne's Church in Cork, you never know which face is telling the truth.

It may be a historic 17th-century coaching inn, but the George Inn still functions like a modern pub.

A 30-foot-tall goat tower in central Illinois is home to a herd of Swiss ungulates.

This centuries-old tree has been a witness to some of the most important events in the history of the Philippines.