Ok, I searched a little “wider” and following a couple of articles I ended up finding a way to do it 
References:
Beware that there are some syntax errors in this. Use ArrayExpression instead of Expression as you can find out from this excellent article:
The final code looks like this snippet:
var _expType = Expression.Property(TYPE).EqualTo(Expression.String(typeof(Lake).Name))
var _points = ArrayExpression.Variable("points");
var _lat = ArrayExpression.Variable("points.lat");
var _lon = ArrayExpression.Variable("points.lon");
var expGeo = ArrayExpression.Any(_points).In(Expression.Property("points"))
.Satisfies(_lat.Between(Expression.Double(55.5), Expression.Double(55.6))
.And(_lon.Between(Expression.Double(11.0), Expression.Double(11.5))));
var _condition = _expType.And(expGeo);
using (var query = QueryBuilder.Select(
SelectResult.All())
.From(dbSource)
.Where(_condition)
)
{
var result = query?.Execute()?.AllResults();
list.AddRange(result?.ToObjects<T>(AppConstants.DB_NAME));
}
Obviously, I just need to fit in the real position params in the above example 