The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

The world's oldest bookshop still in operation.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Once featuring over 60 miniature replicas of famous Chinese locations, the Splendid China theme park was completely abandoned and is now mostly rubble.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

Bat house that has only ever housed bat for one night; they all flew away and never came back.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

Tiny communists hammer away on the Olomouc Astronomical Clock.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Eat the ultimate iteration of Portugal's most beloved pastry.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

These small, brass stones commemorate the first Roma victims of the Holocaust.

A concrete plant shaped like four giant soldiers commemorates one of the most decisive battles of the Napoleonic Wars.

Mummified monks and the accidentally interred, in a 17th-century crypt.

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

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