A preserved ancient Marshall Britannia steam locomotive on display at a train station.

Of five volcanoes located in the massive Tengger caldera, this cone is the youngest and most active.

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

Hundreds of Buddhas in a re-discovered Indonesian temple.

This tiny lake temple dedicated to a water goddess seems to float on the surface.

The world's largest frame offers spectacular views of the city's past and present.

This futuristic building is yet another architectural wonder in Dubai.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

An incredibly salty lake inside the crater of an extinct volcano.

This abandoned Soviet circus is slowly being restored to its Communist-era glory.

Soviet-era gates guard an unexpected urban forest—and a future U.S. embassy.

A haunted outpost in Moldova, where guards are said to have fired at a ghostly figure.

Once the tallest building in Chisinau, this unique tower is a relic of Soviet architecture.

A unique collection of Soviet military artifacts lies hidden away in a disused train, in the unrecognized Eastern European republic of Transnistria.

At less than four inches in height, this iconic fictional character is the smallest public statue in all of Moldova.

Seventy-five miles of limestone caves host more than a million bottles of wine beneath a sleepy Moldovan town.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

Sofia's legislative center is continuously reinventing itself.

"Holy Wisdom" overlooks the city that became its namesake.

A vast Communist-era exhibition space in the Bulgarian capital.

A striking symbol of the Bulgarian capital.

One of Warsaw's coolest malls was once a center for anti-Nazi resistance activity.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

A 20th-century picture show in 3-D.