People who are obsessed with travel can't miss the spectacular sightseeing from these 10 mountainside buildings.

Some of them are known for gorgeous and unbelievable constructions. Others feature amazing natural beauty and a romantic atmosphere, while still others stand out for long history.

They have one thing in common, however: all are sure to leave an unforgettable impression.

   Swallow's Nest, Yalta, Ukraine

Built in 1912, the Swallow's Nest is one of the most popular attractions in Crimea. The two-level home was built atop the 40-metre-high Aurora Cliff and includes a foyer, two bedrooms and the guest room and a fancy restaurant. It has appeared in several films, like Agatha Christie's "And Then There Were None." Sitting in the Neo-Gothic house and enjoying the amazing sea view outside is an amazing experience.