A stone troll guards the hike that leads to this waterfall.

A controversial blue hoop has been puzzling freeway drivers since 2013.

The oldest landmark of Toronto is a testament to shifting sands.

An ancient Greek monument and a Byzantine church coexist inside this cave.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Savor sheep milk yogurt at the last of Athens' dairy bars.

A pre-war mansion that survived the modernization of Athens.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

The hallucinogenic center of the ancient world.

A scenic UNESCO site that doubles as a habitat for various forms of wildlife.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

A tiny church on a man-made island in the Adriatic.

A sculpture serving as an homage to Pope John Paul II.

Where Venice's gondolas go for a tune-up.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Tiny museum with unusual specimens.

Bridge that died in war and was resurected.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

One of the few beardless depictions of Lincoln, George Grey Barnard's 1917 statue was denounced by many—including Lincoln's own son.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.