Places riedermarcus Wants to Go

This unassuming passageway played a key role in one of the most important events in U.S. history.

This pedestrian walkway cuts through a cemetery and over several burial vaults.

Also known as "Hell Alley," this tiny street in Imola gained its name in a bloody episode in the 16th-century.

This historic patch of real estate offers a glimpse of colonial Boston.

A Roman calendar dating to the first century is tucked away in a small town alley.

A signal indicates the entrance to this alley, rumored to be a meeting place for witches.

A small alleyway with an unusual moniker.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

From carts to cars, this leftover Roman bridge in France has managed to survive for centuries.

An ancient capital city that dates back 3,000 years and harbors many surprises.

The largest earthwork effigy in the world.

An ancient iron pillar in Delhi that seems to be rustproof.

Roots and stumps that lay inundated for two millennia are on display in Japan's city of three mysteries.

A perfect circle of 24 mysterious holes dates back to prehistoric times.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

Native Americans built this circle of stones, which was used to predict astronomical events.

A preserved oak tree about 3,500 years old found in Riga, Latvia.

The closest thing to Mars on Earth.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

Home to Hollywood history and a very special salt crystal.

Hidden behind Lincoln's head is a chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.