Places F40fan Wants to Go

Stalinist skyscraper built with help of cryotechnology.

The tallest hotel in Europe.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

An art museum inside an active factory.

This impressively complicated radioastronomy research center was once a tool of Soviet spies.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

3,000 market stands in five former Zeppelin hangars.

Two well-hidden huts let animal lovers spend the night among the bears, wolves, and other predators of the forest.

Rusted cars, trucks, and buses form a fascinating collection of Soviet-era machinery.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

Electrical curiosity museum housed in an old transformer station.