This steep-walled ravine contains animal-shaped formations made from sandstone.

Beautiful and terrifying masks displayed in the island’s only mask library.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

The world's largest public collection of PEZ memorabilia.

Breathtaking and huge 430 year old maps of Italy.

A plaque honoring a Hungarian hero of Italy is hidden in plain sight in Palermo.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

Designed to commemorate the founding of the first settlement in Delaware.

This one-time health resort was used by aristocrats around the world.

A grotesque Fiji merman dwells within this traditional Dutch-style building.

The historic home still shows the scars from a little run-in with the British in 1813.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

Dine amidst exotic plants at this former royal greenhouse.

Baroque celebration of the end of the Great Plague of Vienna.

Handsomely crafted representations of our round planet.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The beautiful baroque library of the Hapsburg empire.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.