The curios of pharmacist and collector Henry Wellcome.

An open-air museum of 18th-century homes and churches transported from various villages in Southern Poland.

This extensive collection covers thousands of years of Polish military history.

The site of one of the largest prison escapes of World War II.

This picturesque castle in Poland has a rich history, including a legend that ties it to lost Incan treasures.

This 13th century Gothic brick castle is the largest in the world by surface area.

Order “Proletariat’s Cutlet” at this communist-themed restaurant allegedly once visited by Lenin.

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

Boats must transform into railroad cars to navigate this Polish canal.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

An underground city of salt.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Vice President Humphrey's final resting place is tucked away in this cemetery along with a few other notable figures.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

Where a guard killed nine German prisoners during one of the worst 20th-century POW camp massacres in U.S. history.

A small oasis not far from downtown Moab.

The notorious Wild West outlaw was raised in this unassuming abode.

A tunnel with windows, so you don't miss out on the impressive views.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

These 18th-century paintings of Warsaw were used to reconstruct the city after World War II.