This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

Only a fragment of this 15th-century Dance of Death survives today.

The Guardian of Tallinn.

Canada's oldest sugar maple has been growing since around 1500.

Inside this discotheque resides a unique memorial dedicated to one club-goers favorite pet.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

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

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

The only museum with its curator—and her pets—buried inside.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

Go inside to really appreciate this 500-year-old technological masterpiece.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

It's good luck to be mocked by this monkey.

The third version of this tall sailing ship sits, rusted and burnt, in Lake Ontario.

One of the largest underground systems runs under Canada's largest urban center.

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

Soaring over the Niagara Whirlpool since 1916.

This replica of the Greek structure is in the heart of Nashville.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.