A 30-foot-high stream of chocolate flows continuously at the Lindt Home of Chocolate.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

How did a 154-foot-long piece of spacecraft wind up abandoned along the side of a Florida road?

The ruins of this magnificent Scottish castle blend both Gothic and Renaissance architectural styles.

This castle was first occupied in the 1400s and has undergone major restoration in recent times.

The oldest Roman lighthouse still in use.

One of the oldest lighthouses in the world, this structure was built more than 800 years ago.

Ornamented with "Bristol Diamonds," this exotic shell grotto is considered to be the finest surviving example from the eighteenth century.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

The legendary fortress of a female Kurdish warrior leader.

Almost too short to be an actual street, this stretch of road maintains a unique moniker.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

Series of storm drains connected to a dark urban legend.

A museum dedicated to the mysterious cryptid.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

A burial vault located under Tiber Island in the middle of the Italian capital.

A hidden gem in the middle of the city's infamous Jewelry Quarter.

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

Once a passageway that led to the Shaniwar Wada palace fort.

The winter home of millions of migrating monarch butterflies.

The largest source of fossilized insects anywhere.

A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.

Fortified homes of highland warriors that are still in use today.

The cell which saved the life of Ludger Sylbaris, "the man who lived through Doomsday."