Know Before You Go: The Catacombs are a sacred place. Inside the constant temperature is about 15 degrees Celsius or 59 degrees Fahrenheit and humid; please dress appropriately
Know Before You Go: The Monument is not wheelchair accessible and is not recommended for those who are claustrophobic and those with serious walking problems: there are 50 irregular steps to go down, as many to go up, and no possibility to sit down along the way. There are no elevators, and the floor is uneven