Siwa is the most isolated big oasis in Egypt and is very close to the Libyan border and over 550 km from Cairo. The best way to get there is from Marsa Matruh driving 300 km on the road. Siwa has nice limestone cliffs around it and has the Great Sand Sea to the south as well as various salt lakes that go from being quite big to drying up during the hottest times of the year. There are charming old buildings in Siwa made from mud from the lakes and Siwa is known across Egypt (and the world!) for its delicious dates and olives, not to mention its extraordinary beauty. Siwa is also becoming increasingly known for its drinking water and numerous mineral water companies now produce and ship water from this beautiful oasis.