A schooner, nicknamed "The Unsinkable," with a long history of survival in the Indian Ocean.

The remains of a 19th-century school and living quarters are perched atop a mountain surrounded by a thick tropical forest.

This vestige of Seychelles’s colonial past now resides in a busy intersection and didn’t chime for its first 96 years.

A British general, a suggestive tree, a map of paradise.

One of the oldest restaurants in the Seychelles.

A collection of collections ranging from dentistry to minerals.

One Italian taxi driver covered his entire house in small seashells creating a weird bit of architecture that is preserved to this day.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

A small house sits between two huge rocks, with its back to the sea.

Qatar's oldest market can trace its origins back more than a century.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

Rumors and legends of secret Nazi activities surround this eerily remote island mansion.

An ancient fortification lives on in this Chinese city.

This stunning limestone waterfall is the highest in Estonia.

A breathtaking viewing platform over the Alps.

This abandoned office building is a lasting example of Soviet-era architecture.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

Art Deco stylings conceal the true nature of this bridge.

This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins.

A remote island settlement off the coast of Tanzania is a storied archaeological site with an ancient past.

Sitting atop a rock on Michamvi Pingwe beach, this restaurant becomes its own island at high tide.

This monument is a stark reminder of the horrors of the Zanzibar slave trade.

In Zanzibar, a historic 19th-century palace is a reminder of the world's shortest war.