Hotel Excelsior which occupies one of the largest waterfront properties in Dubrovnik, is built into the rocks, and the seaside location is incorporated into almost every aspect of the hotel. The iconic outdoor rock pool is truly a highlight of the property. It is made of stone and filled with salty sea water through little holes in the walls. The rocky sunbathing area is perched just above water where guests are treated to dreamy views of Old Town, and the surrounding Adriatic Sea feeds the hotel's spectacular saltwater pool. One thing to keep in mind is that rocky floor can be quite slippery from algae. Also, water level depends on the tides- when the water is calm due to low tide the pool may only have a few feet of seawater.