Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

This extravagant villa built by a Burmese merchant is part pagoda and part European mansion.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

This holy site either displays a centuries-old cross or a complete fake.

A small statue of child Jesus given by Magellan in 1521

This Soviet-era athletic and recreation facility is the highest ice skating rink in the world.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

Giant cauldrons overflow with Uzbekistan's favorite rice dish at this cavernous dining hall.

Across this single-file rope bridge is what has been claimed to be the edge of continental Asia.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

Resonant stone, that has been played since prehistoric times.

A massive collection of petroglyphs dating back some 40,000 years.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

This building has survived for more than a century and remains virtually untouched.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

This sculpture honors the man who was known as the "Righteous Among the Nations."

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

A maze of underground tunnels beneath one of the most beautiful forts in Serbia.