One of Australia's largest secondhand bookstores.

A sparkling sandstone cliffside that's worth a visit while it still exists.

The only pollutant in the clear blue water is sunscreen.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

A small, but award-winning beach known for its literally spotless reputation.

Native Australian lizards inhabit this garden celebrating Sydney and its sister city in China.

A monument to the 4,114 Irish orphan girls who arrived in Australia between 1848 and 1850.

Though considered an eyesore by some, this boxy Brutalist high-rise plays a significant role in Sydney's past.

One of Sydney's oldest graveyards hides in plain sight behind a hospital.

A self-funded cemetery with a long list of inhabitants.

Cockatoo Island is a Heritage-listed island in the middle of Sydney Harbour.

Come for the flowers, stay for the bats!

A collaboration of art and ornithology mourns the calls of Sydney's lost birds.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

Originally a meeting place for foreign correspondents and war reporters, the FCC remains an atmospheric spot for sunset drinks in Phnom Penh.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

Khmer Rouge's high security prison.

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

A battle between nature and architecture in the Cambodian jungle.

Vietnam's largest Buddha statue depicts a female sage.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.

This French colonial post office is arguably the grandest in all of Southeast Asia.

A memorial to the monk who set himself on fire to protest the persecution of Buddhists in Vietnam.