The Swallow's Nest (Ukrainian: Ластівчине гніздо, romanized: Lastivchyne hnizdo)[nb 1] is a decorative castle located at Gaspra, a small spa town between Yalta and Alupka on the Crimean peninsula.

The castle overlooks the Cape of Ai-Todor on the Black Sea coast and is located near the remains of the Roman castrum of Charax.

In 1911 a Russian nobleman of German ancestry, Baron Pavel Leonardovich von Steinheil (1880-1965), the son of Baron Leonard Vasilievitch von Steinheil (1843-1918) and his wife, Ekaterina Pavlovna Kamenskaya (1850-1929), who had made a fortune extracting oil in Baku, acquired the timber cottage and within a year had it replaced with the current building called Schwalbennest.

The project involved the restoration of a small portion of the castle and the addition of a monolithic console concrete plate to strengthen the cliff.

[11] Owing to its important status as the symbol of the Crimea's southern coast, the Swallow's Nest was featured in several Soviet films.