A Gruta dos Moinhos Velhos (juntamente com a Gruta da Pena e a Gruta da Contenda), faz parte de uma grande rede de galerias com mais de 11 Km de extensão, constituindo dos mais importantes sistemas subterrâneos do Maciço Calcário Estremenho. Caracteriza-se pela existência de dois coletores paragenéticos fósseis, de diâmetro aproximadamente decamétrico, com afluentes desenhando uma rede dendrítica e um conjunto de galerias semi-ativas de traçado dendrítico a norte e angulado a sul. A zona fóssil tem um desnível de 100 metros e a espessura da zona intermédia varia entre 80 metros a montante e 60 metros a jusante, circulando a água por galerias singenéticas, do quadrante norte para o quadrante sul, em direção à exsurgência da Gruta da Pena.

Podem definir-se quatro fases na evolução do sistema. A primeira é representada por galerias freáticas superficiais, de pequeno diâmetro, a segunda pelo coletor paragenético da Galeria Gémea, a terceira pela Galeria Grande e seus afluentes e a última pelas galerias ativas e semi-ativas dos andares inferiores.

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Compare rooms and suites by Independent in Porto de Mos with rates, reviews, and availability. Most hotels are fully refundable.

"Excelente property with a good restaurant on site just a block away from the sanctuary of Fátima."

AED 186 total

includes taxes & fees

30 Jun - 1 Jul

"Good place "

"Excellent "

AED 351 total

includes taxes & fees

9 Jul - 10 Jul

"very good location three-minute walk to the sand "

"Nice clean rooms on the beach. Parking was a bit of a hassle but worth the location "

AED 321 total

includes taxes & fees

30 Jun - 1 Jul

"Beautiful hotel in the center of town. Walkable to all the sights. "

AED 479 total

includes taxes & fees

3 Jul - 4 Jul

"Amazing space, with amazing service and location. "

"Nice place. Nice rooms. "

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Recent reviews of Porto de Mos hotels

5/5 Excellent

"Clean, comfortable, and located within walking distance to basically everywhere I wished to visit in town of Tomar. Rooftop terrace has nice view of Castelo dos Templarios…and great place to enjoy a glass or two of wine"

A verified traveler from Cashmere stayed at Thomar Boutique Hotel

Posted 3 days ago

5/5 Excellent

"I really enjoyed the location of this property. I stayed in Room 11 which doesn't really have a view or anything, and it's very compact, but it was perfect for what I needed. The location cannot be beat! Check in really starts at 3pm. I showed up at 2pm, and it was locked, which is totally fine! The breakfast is a prepared bunch of rolls, cheese, meat, coffee drink, jam, butter, and a real Nata pastry. Delicious! I would stay at By the Sea anytime I return to Nazaré. "