Tubing through a cave lit with glowworms is a magical underground experience.

This sheep farm has been forever transformed since being built for “The Hobbit” film series.

Come for the flowers, stay for the bats!

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

Sofia's legislative center is continuously reinventing itself.

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

A striking symbol of the Bulgarian capital.

This historic black and white monastery is one of Bulgaria's architectural jewels.

Dozens of elegant ceramic tiles decorate these ancient walls, each displaying the Lord's Prayer in a different language.

A stunning mosque owes its design to an Ottoman ruler nicknamed "the Butcher."

This unassuming oasis elevated just above the busy streets of Jerusalem offers one of the best views of the Old City.

The only quarter of the Old City not dedicated to a major world religion.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

An ancient underground cultic temple where sunlight penetrates on the summer solstice.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

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

This enormous 32-foot painting depicts Poland's greatest medieval battle in glorious detail.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

This fairytale medieval church in Poland originally spent centuries in Norway.

A memorial to the beloved brown bear that served in the Polish army during World War II.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.