A spectacular Petrine Baroque summer palace commissioned for Catherine I by Peter the Great.

The Guardian of Tallinn.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

This free museum is building a collection of books that are banned, censored or burnt around the world.

Spend your honeymoon where the Devil had his wedding.

The oldest continuously operating pharmacy in Europe.

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

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

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

"There's nothing there," and other lies the KGB told us.

A historic scientific breakthrough that crosses nine borders.

First point in the Struve Geodetic Arc, a 19th century undertaking to measure the Earth's size and shape.

The labyrinthine home of the National Archives of Estonia is an experimental blend of architecture, art, and history.

The longest enclosed pedestrian bridge in the world spans 14 lanes of traffic and six rail tracks, all while lighting up the night sky.

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

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

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 impressive working clock made of 16,000 plants changes its flowers twice a year.

This seemingly cursed monument is dedicated to one of Canada's great war heroes.

This historic fort spans more the 300 years.

This metal sculpture is a tribute to the Canadian Pacific Railway, which had a station in the village that has now been converted into a library.

Known as "Toronto's Flatiron."

A monument to the 17,000 Chinese who worked and died to build Canada's Pacific Railway.