5,000 skulls in memorial to those killed by the Khmer Rouge.

One of the biggest markets in Asia, under one of the continent's largest domes.

Khmer Rouge's high security prison.

Founded by French colonists in 1919, this mountain resort has been transformed into one-of-a-kind theme park.

This antique shop offers affordable 15th-century Vietnamese ceramics salvaged from a local shipwreck.

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

An extravagant monument to an extravagantly unpopular Emperor.

Perhaps the only one of its kind, the nearly-forgotten site once held mortal (and rigged) gladiatorial games between tigers and imperial war elephants.

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

Unbeknownst to many, this fountain was erected as a tomb and still holds the remains of a Frenchman.

Under Hanoi’s medieval citadel sits a secret military headquarters from the final years of the Vietnam War.

Walk through a clothing store, across a courtyard, and up several flights of stairs for delicious coffee with a side of beautiful views.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

Don’t miss the local staple of rice vermicelli with charcoal-grilled pork patties and pork belly.

Life-sized painted illusions let pedestrians blend in with the street art.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Fantastic views and thousands of love locks.

Carved fountains poignantly placed in parks and in front of special monuments.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

Somber memorial to the May 10, 1933, book-burning which took place on this spot.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.