These crumbling Latvian forts make for some haunting seaside ruins.

3,000 market stands in five former Zeppelin hangars.

The oldest housing complex in Riga is a mini timeline of architectural trends.

Flamboyant architecture from the turn of 20th century.

Christianity and Islam have clashed, yet here a Serbian Orthodox church and a mosque stand together.

A futuristic, brutalist masterpiece that is also strangely prison-like.

These two strange cones are actually a system of old nautical navigation beacons.

This set of concrete chambers resonates according to different notes of octaves.

One of the oldest lighthouses in the world has been in continuous use since it was first built in 1531.

The widest natural waterfall in Estonia is a sight to see in all seasons.

This abandoned office building is a lasting example of Soviet-era architecture.

This old and disused water tower has received a new life as an art gallery with a piano staircase.

This Estonian watchtower looks like a big tree with two giant bird nests on it, complete with a "golden egg."

This stunning limestone waterfall is the highest in Estonia.

A historic scientific breakthrough that crosses nine borders.

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

This abandoned fighter jet launch center is now a haunting street racing course.

This soviet pilot's graveyard is filled with headstones made of airplane fins.

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

The oldest continuously operating pharmacy in Europe.

Relics from an era long gone, sit idle outside this Estonian museum.

A former imperial sea-fortress and Soviet prison.

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

A forest park outside Tallinn full of architectural and artistic curiosities.